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<item><guid isPermaLink="false">http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_mug-168785219473280492</guid><pubDate>Wed, 19 Jul 2006 07:10:56 GMT</pubDate><title><![CDATA[The Expanding Light Echo of Red Supergiant Star Coffee Mug]]></title><link>http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_mug-168785219473280492</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[The Expanding Light Echo of Red Supergiant Star]]></media:title><media:description><![CDATA[This image shows a time sequence of Hubble Space Telescope images of the light echo around V838 Mon, taken between May 2002 and October 2004. All six pictures were taken with Hubble&#39;s Advanced Camera for Surveys using filters sensitive to blue, visible, and infrared wavelengths. The apparent expansion of the light echo, as light from the early 2002 outburst of V838 Mon propagates outward into the surrounding dust, is clearly shown.

All of the images are shown at the same scale. Moreover, the images are also shown as they would appear for the same exposure times throughout the sequence. Thus the background stars appear constant in brightness, while the surface brightness of the light echo steadily declines. The fading of the light echo is primarily due to the light-scattering properties of interstellar dust. Consider a street lamp on a foggy night. The halo around the lamp is brightest right next to the lamp, while out to the side it is much fainter. Similarly, in the first V838 Mon image, taken in May 2002, the light echo was very bright and compact. At later times, we are seeing dust out to the side of the star, rather than dust that is immediately in front of the star, so the amount of light scattered in our direction is smaller. Hubble astronomers expect the light echo to continue to change its appearance and brightness over the next several years.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_mug-r9f416a9f3c0a43aa84bdcce66e7ed496_x7jyu_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_mug-r9f416a9f3c0a43aa84bdcce66e7ed496_x7jyu_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_mug-168243122643898534</guid><pubDate>Wed, 19 Jul 2006 06:58:50 GMT</pubDate><title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows Mug]]></title><link>http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_mug-168243122643898534</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows]]></media:title><media:description><![CDATA[This image of star cluster NGC 346 and its surrounding star-formation region was taken in July 2004 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope. Located 210,000 light-years away in the Small Magellanic Cloud (SMC), a satellite galaxy of our Milky Way, the cluster is one of the most dynamic and intricately detailed star-forming regions in space. A dramatic structure of arched, ragged filaments with a distinct ridge encircles the cluster.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_mug-rdc32468975e84c2dac0183154b635d91_x7jyq_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_mug-rdc32468975e84c2dac0183154b635d91_x7jyq_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, small magellanic cloud, ngc 346, star cluster]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/galaxy_ngc_3079_shirt-235608437649725708</guid><pubDate>Tue, 18 Jul 2006 21:16:03 GMT</pubDate><title><![CDATA[Galaxy NGC 3079 Shirt]]></title><link>http://www.zazzle.com/galaxy_ngc_3079_shirt-235608437649725708</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$23.95</price><media:title><![CDATA[Galaxy NGC 3079]]></media:title><media:description><![CDATA[These NASA Hubble Space Telescope snapshots reveal dramatic activities within the core of the galaxy NGC 3079, where a lumpy bubble of hot gas is rising from a cauldron of glowing matter. The picture at left shows the bubble in the center of the galaxy&#39;s disk. The structure is more than 3,000 light-years wide and rises 3,500 light-years above the galaxy&#39;s disk. The smaller photo at right is a close-up view of the bubble. Astronomers suspect that the bubble is being blown by &quot;winds&quot; (high-speed streams of particles) released during a burst of star formation. Gaseous filaments at the top of the bubble are whirling around in a vortex and are being expelled into space. Eventually, this gas will rain down upon the galaxy&#39;s disk where it may collide with gas clouds, compress them, and form a new generation of stars. The two white dots just above the bubble are probably stars in the galaxy.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/galaxy_ngc_3079_shirt-r885a51379ea4471ab20b589b7d8053d5_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/galaxy_ngc_3079_shirt-r885a51379ea4471ab20b589b7d8053d5_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/galaxy_ngc_3079_postage-172077169483768260</guid><pubDate>Tue, 18 Jul 2006 21:13:27 GMT</pubDate><title><![CDATA[Galaxy NGC 3079 Postage]]></title><link>http://www.zazzle.com/galaxy_ngc_3079_postage-172077169483768260</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[Galaxy NGC 3079]]></media:title><media:description><![CDATA[These NASA Hubble Space Telescope snapshots reveal dramatic activities within the core of the galaxy NGC 3079, where a lumpy bubble of hot gas is rising from a cauldron of glowing matter. The picture at left shows the bubble in the center of the galaxy&#39;s disk. The structure is more than 3,000 light-years wide and rises 3,500 light-years above the galaxy&#39;s disk. The smaller photo at right is a close-up view of the bubble. Astronomers suspect that the bubble is being blown by &quot;winds&quot; (high-speed streams of particles) released during a burst of star formation. Gaseous filaments at the top of the bubble are whirling around in a vortex and are being expelled into space. Eventually, this gas will rain down upon the galaxy&#39;s disk where it may collide with gas clouds, compress them, and form a new generation of stars. The two white dots just above the bubble are probably stars in the galaxy.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/galaxy_ngc_3079_postage-r4cc313f7f6d54807a0a1c2c054d43e50_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/galaxy_ngc_3079_postage-r4cc313f7f6d54807a0a1c2c054d43e50_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/galaxy_ngc_3079_print-228694797222813764</guid><pubDate>Tue, 18 Jul 2006 21:09:09 GMT</pubDate><title><![CDATA[GALAXY NGC 3079 PRINT]]></title><link>http://www.zazzle.com/galaxy_ngc_3079_print-228694797222813764</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$14.90</price><media:title><![CDATA[GALAXY NGC 3079]]></media:title><media:description><![CDATA[These NASA Hubble Space Telescope snapshots reveal dramatic activities within the core of the galaxy NGC 3079, where a lumpy bubble of hot gas is rising from a cauldron of glowing matter. The picture at left shows the bubble in the center of the galaxy&#39;s disk. The structure is more than 3,000 light-years wide and rises 3,500 light-years above the galaxy&#39;s disk. The smaller photo at right is a close-up view of the bubble. Astronomers suspect that the bubble is being blown by &quot;winds&quot; (high-speed streams of particles) released during a burst of star formation. Gaseous filaments at the top of the bubble are whirling around in a vortex and are being expelled into space. Eventually, this gas will rain down upon the galaxy&#39;s disk where it may collide with gas clouds, compress them, and form a new generation of stars. The two white dots just above the bubble are probably stars in the galaxy.]]></media:description><media:price>$14.90</media:price><media:thumbnail url="http://rlv.zcache.com/galaxy_ngc_3079_print-r9b1827d5f22d49168eb12b655ae2ffeb_f1tk_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/galaxy_ngc_3079_print-r9b1827d5f22d49168eb12b655ae2ffeb_f1tk_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_tshirt-235287779854072508</guid><pubDate>Tue, 18 Jul 2006 20:59:10 GMT</pubDate><title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B Shirt]]></title><link>http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_tshirt-235287779854072508</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$23.95</price><media:title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B]]></media:title><media:description><![CDATA[A dusty spiral galaxy appears to be rotating on edge, like a pinwheel, as it slides through the larger, bright galaxy NGC 1275, in this NASA Hubble Space Telescope image.

These images, taken with Hubble&#39;s Wide Field Planetary Camera 2 (WFPC2), show traces of spiral structure accompanied by dramatic dust lanes and bright blue regions that mark areas of active star formation. Detailed observations of NGC 1275 indicate that the dusty material belongs to a spiral system seen nearly edge-on in the foreground. The second galaxy, lying beyond the first, is actually a giant elliptical with peculiar faint spiral structure in its nucleus. These galaxies are believed to be colliding at over 6 million miles per hour.

NGC 1275 is about 235 million light-years away in the constellation Perseus. Embedded in the center of a large cluster of galaxies known as the Perseus Cluster, it is also known to emit a powerful signal at both X-ray and radio frequencies. The galaxy collision causes the gas and dust already existing in the central bright galaxy to swirl into the center of the object. The X-ray and radio emission indicates the probable existence of a black hole at the bright galaxy&#39;s center.

While the dark dusty material in the Hubble image falls inward, NGC 1275 displays intricate filamentary structures at a much larger scale outside the image. This is a typical feature of bright cluster galaxies. Additional observational evidence of strong interactions between at least two galaxies, and possibly a few smaller galaxies, includes the formation of new stars and large star clusters. Although similar in shape to the old globular clusters in the Milky Way galaxy, NGC 1275&#39;s clusters are much younger and contain 100,000 to a million stars each.

This image was created from archived blue and red Hubble WFPC2 data taken in 1995 by John Trauger (JPL) and Jon Holtzman (NMSU). The Hubble Heritage team, along with collaborators Megan Donahue, Jennifer Mack, and Mark Voit (STScI), took follow-up WFPC2 observations at infrared wavelengths in 2001 to help produce this full-color image.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_tshirt-red878d43f4264b6890f4531fd3979e04_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_tshirt-red878d43f4264b6890f4531fd3979e04_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_postage-172659068507411085</guid><pubDate>Tue, 18 Jul 2006 20:54:52 GMT</pubDate><title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B Postage]]></title><link>http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_postage-172659068507411085</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_postage-172659068507411085" id="page_zWidget6-title" class="gbb-productTitle" title="Freewheeling Galaxies Collide in a Blaze of Star B Postage">Freewheeling Galaxies Collide in a Blaze of Star B Postage</a>
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</div>]]></description><price>$22.95</price><media:title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B]]></media:title><media:description><![CDATA[A dusty spiral galaxy appears to be rotating on edge, like a pinwheel, as it slides through the larger, bright galaxy NGC 1275, in this NASA Hubble Space Telescope image.

These images, taken with Hubble&#39;s Wide Field Planetary Camera 2 (WFPC2), show traces of spiral structure accompanied by dramatic dust lanes and bright blue regions that mark areas of active star formation. Detailed observations of NGC 1275 indicate that the dusty material belongs to a spiral system seen nearly edge-on in the foreground. The second galaxy, lying beyond the first, is actually a giant elliptical with peculiar faint spiral structure in its nucleus. These galaxies are believed to be colliding at over 6 million miles per hour.

NGC 1275 is about 235 million light-years away in the constellation Perseus. Embedded in the center of a large cluster of galaxies known as the Perseus Cluster, it is also known to emit a powerful signal at both X-ray and radio frequencies. The galaxy collision causes the gas and dust already existing in the central bright galaxy to swirl into the center of the object. The X-ray and radio emission indicates the probable existence of a black hole at the bright galaxy&#39;s center.

While the dark dusty material in the Hubble image falls inward, NGC 1275 displays intricate filamentary structures at a much larger scale outside the image. This is a typical feature of bright cluster galaxies. Additional observational evidence of strong interactions between at least two galaxies, and possibly a few smaller galaxies, includes the formation of new stars and large star clusters. Although similar in shape to the old globular clusters in the Milky Way galaxy, NGC 1275&#39;s clusters are much younger and contain 100,000 to a million stars each.

This image was created from archived blue and red Hubble WFPC2 data taken in 1995 by John Trauger (JPL) and Jon Holtzman (NMSU). The Hubble Heritage team, along with collaborators Megan Donahue, Jennifer Mack, and Mark Voit (STScI), took follow-up WFPC2 observations at infrared wavelengths in 2001 to help produce this full-color image.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_postage-r7d0d6d6ea0d848deb3b9c34cf207a0c3_xjswm_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_postage-r7d0d6d6ea0d848deb3b9c34cf207a0c3_xjswm_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_poster-228238054030544101</guid><pubDate>Tue, 18 Jul 2006 20:52:30 GMT</pubDate><title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B Posters]]></title><link>http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_poster-228238054030544101</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_poster-228238054030544101" id="page_zWidget7-title" class="gbb-productTitle" title="Freewheeling Galaxies Collide in a Blaze of Star B Posters">Freewheeling Galaxies Collide in a Blaze of Star B Posters</a>
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</div>]]></description><price>$12.50</price><media:title><![CDATA[Freewheeling Galaxies Collide in a Blaze of Star B]]></media:title><media:description><![CDATA[A dusty spiral galaxy appears to be rotating on edge, like a pinwheel, as it slides through the larger, bright galaxy NGC 1275, in this NASA Hubble Space Telescope image.

These images, taken with Hubble&#39;s Wide Field Planetary Camera 2 (WFPC2), show traces of spiral structure accompanied by dramatic dust lanes and bright blue regions that mark areas of active star formation. Detailed observations of NGC 1275 indicate that the dusty material belongs to a spiral system seen nearly edge-on in the foreground. The second galaxy, lying beyond the first, is actually a giant elliptical with peculiar faint spiral structure in its nucleus. These galaxies are believed to be colliding at over 6 million miles per hour.

NGC 1275 is about 235 million light-years away in the constellation Perseus. Embedded in the center of a large cluster of galaxies known as the Perseus Cluster, it is also known to emit a powerful signal at both X-ray and radio frequencies. The galaxy collision causes the gas and dust already existing in the central bright galaxy to swirl into the center of the object. The X-ray and radio emission indicates the probable existence of a black hole at the bright galaxy&#39;s center.

While the dark dusty material in the Hubble image falls inward, NGC 1275 displays intricate filamentary structures at a much larger scale outside the image. This is a typical feature of bright cluster galaxies. Additional observational evidence of strong interactions between at least two galaxies, and possibly a few smaller galaxies, includes the formation of new stars and large star clusters. Although similar in shape to the old globular clusters in the Milky Way galaxy, NGC 1275&#39;s clusters are much younger and contain 100,000 to a million stars each.

This image was created from archived blue and red Hubble WFPC2 data taken in 1995 by John Trauger (JPL) and Jon Holtzman (NMSU). The Hubble Heritage team, along with collaborators Megan Donahue, Jennifer Mack, and Mark Voit (STScI), took follow-up WFPC2 observations at infrared wavelengths in 2001 to help produce this full-color image.]]></media:description><media:price>$12.50</media:price><media:thumbnail url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_poster-re272fe718f2a422d80427c30665e3c26_afgx_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/freewheeling_galaxies_collide_in_a_blaze_of_star_b_poster-re272fe718f2a422d80427c30665e3c26_afgx_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_postage-172673917996904930</guid><pubDate>Tue, 18 Jul 2006 20:43:40 GMT</pubDate><title><![CDATA[A Bright Supernova in the Nearby Galaxy NGC 2403 Postage]]></title><link>http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_postage-172673917996904930</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_postage-172673917996904930" id="page_zWidget8-title" class="gbb-productTitle" title="A Bright Supernova in the Nearby Galaxy NGC 2403 Postage">A Bright Supernova in the Nearby Galaxy NGC 2403 Postage</a>
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</div>]]></description><price>$22.95</price><media:title><![CDATA[A Bright Supernova in the Nearby Galaxy NGC 2403]]></media:title><media:description><![CDATA[The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The arrow at top right points to the stellar blast, called a supernova. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light-years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade.

The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to &quot;burn&quot; through nuclear fusion, but they use it up at a disproportionately faster rate.) A team of astronomers led by Jesus Maiz of the Space Telescope Science Institute discovered that the supernova was part of a compact cluster of stars known as Sandage 96, whose total mass is about 24,000 times the mass of the Sun. Many such clusters — the blue regions — as well as looser associations of massive stars, can be seen in this image. The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past half-century.

The heart of NGC 2403 is the glowing region at lower left. Sprinkled across the region are pink areas of star birth. The myriad of faint stars visible in the Hubble image belong to NGC 2403, but the handful of very bright stars in the image belong to our own Milky Way Galaxy and are only a few hundred to a few thousand light-years away. This image was taken on Aug. 17, two weeks after an amateur astronomer discovered the supernova.

Japanese amateur astronomer Koichi Itagaki discovered the supernova on July 31, 2004, with a small telescope. Additional observations soon showed that it is a &quot;Type II supernova,&quot; resulting from the explosion of a massive, hydrogen-rich star at the end of its life. The cataclysm probably occurred when the evolved star&#39;s central core, consisting of iron, suddenly collapsed to form an extremely dense object called a neutron star. The surrounding layers of gas bounced off the neutron star and also gained energy from the flood of ghostly &quot;neutrinos&quot; (tiny, almost non-interacting particles) that may have been released, thereby violently expelling these layers.

This explosion is ejecting heavy chemical elements, generated by nuclear reactions inside the star, into the cosmos. Like other Type II supernovae, this exploding star is providing the raw material for future generations of stars and planets. Elements on Earth such as oxygen, calcium, iron, and gold came long ago from exploding stars such as this one.

Astronomers will continue to study SN 2004dj over the next few years, as it slowly fades from view, in order to gain a better understanding of how certain types of stars explode and what kinds of chemical elements they eject into space.

This color-composite photograph was obtained by combining images through several filters taken with the Wide Field Camera of the Advanced Camera for Surveys. The colors in the image highlight important features in the galaxy. Hot, young stars are blue. Older stars and dense dust lanes near the heart of the galaxy are red. The hydrogen-rich, star-forming regions are pink. The dense concentration of older stars in the galaxy&#39;s central bulge is yellow.

In addition to the visible-light image shown here, ultraviolet images and spectra are being obtained with Hubble&#39;s Advanced Camera for Surveys. Astronomers are also using ground-based telescopes to study the supernova.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_postage-rcddc4695aaaa4afb9b738b1816ad9677_xjswm_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_postage-rcddc4695aaaa4afb9b738b1816ad9677_xjswm_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy, ussr]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_poster-228552095198685132</guid><pubDate>Tue, 18 Jul 2006 20:41:22 GMT</pubDate><title><![CDATA[A Bright Supernova in the Nearby Galaxy NGC 2403 Poster]]></title><link>http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_poster-228552095198685132</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_poster-228552095198685132" id="page_zWidget9-title" class="gbb-productTitle" title="A Bright Supernova in the Nearby Galaxy NGC 2403 Poster">A Bright Supernova in the Nearby Galaxy NGC 2403 Poster</a>
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</div>]]></description><price>$17.95</price><media:title><![CDATA[A Bright Supernova in the Nearby Galaxy NGC 2403]]></media:title><media:description><![CDATA[The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The arrow at top right points to the stellar blast, called a supernova. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light-years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade.

The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to &quot;burn&quot; through nuclear fusion, but they use it up at a disproportionately faster rate.) A team of astronomers led by Jesus Maiz of the Space Telescope Science Institute discovered that the supernova was part of a compact cluster of stars known as Sandage 96, whose total mass is about 24,000 times the mass of the Sun. Many such clusters — the blue regions — as well as looser associations of massive stars, can be seen in this image. The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past half-century.

The heart of NGC 2403 is the glowing region at lower left. Sprinkled across the region are pink areas of star birth. The myriad of faint stars visible in the Hubble image belong to NGC 2403, but the handful of very bright stars in the image belong to our own Milky Way Galaxy and are only a few hundred to a few thousand light-years away. This image was taken on Aug. 17, two weeks after an amateur astronomer discovered the supernova.

Japanese amateur astronomer Koichi Itagaki discovered the supernova on July 31, 2004, with a small telescope. Additional observations soon showed that it is a &quot;Type II supernova,&quot; resulting from the explosion of a massive, hydrogen-rich star at the end of its life. The cataclysm probably occurred when the evolved star&#39;s central core, consisting of iron, suddenly collapsed to form an extremely dense object called a neutron star. The surrounding layers of gas bounced off the neutron star and also gained energy from the flood of ghostly &quot;neutrinos&quot; (tiny, almost non-interacting particles) that may have been released, thereby violently expelling these layers.

This explosion is ejecting heavy chemical elements, generated by nuclear reactions inside the star, into the cosmos. Like other Type II supernovae, this exploding star is providing the raw material for future generations of stars and planets. Elements on Earth such as oxygen, calcium, iron, and gold came long ago from exploding stars such as this one.

Astronomers will continue to study SN 2004dj over the next few years, as it slowly fades from view, in order to gain a better understanding of how certain types of stars explode and what kinds of chemical elements they eject into space.

This color-composite photograph was obtained by combining images through several filters taken with the Wide Field Camera of the Advanced Camera for Surveys. The colors in the image highlight important features in the galaxy. Hot, young stars are blue. Older stars and dense dust lanes near the heart of the galaxy are red. The hydrogen-rich, star-forming regions are pink. The dense concentration of older stars in the galaxy&#39;s central bulge is yellow.

In addition to the visible-light image shown here, ultraviolet images and spectra are being obtained with Hubble&#39;s Advanced Camera for Surveys. Astronomers are also using ground-based telescopes to study the supernova.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_poster-rc61ee2e341b14d54a4a2d16f4ba92cce_ai990_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/a_bright_supernova_in_the_nearby_galaxy_ngc_2403_poster-rc61ee2e341b14d54a4a2d16f4ba92cce_ai990_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_postage-172408135976125164</guid><pubDate>Tue, 18 Jul 2006 20:35:50 GMT</pubDate><title><![CDATA[The Expanding Light Echo of Red Supergiant Star  Stamps]]></title><link>http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_postage-172408135976125164</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_postage-172408135976125164" id="page_zWidget10-title" class="gbb-productTitle" title="The Expanding Light Echo of Red Supergiant Star  Stamps">The Expanding Light Echo of Red Supergiant Star  Stamps</a>
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</div>]]></description><price>$22.95</price><media:title><![CDATA[The Expanding Light Echo of Red Supergiant Star ]]></media:title><media:description><![CDATA[This image shows a time sequence of Hubble Space Telescope images of the light echo around V838 Mon, taken between May 2002 and October 2004. All six pictures were taken with Hubble&#39;s Advanced Camera for Surveys using filters sensitive to blue, visible, and infrared wavelengths. The apparent expansion of the light echo, as light from the early 2002 outburst of V838 Mon propagates outward into the surrounding dust, is clearly shown.

All of the images are shown at the same scale. Moreover, the images are also shown as they would appear for the same exposure times throughout the sequence. Thus the background stars appear constant in brightness, while the surface brightness of the light echo steadily declines. The fading of the light echo is primarily due to the light-scattering properties of interstellar dust. Consider a street lamp on a foggy night. The halo around the lamp is brightest right next to the lamp, while out to the side it is much fainter. Similarly, in the first V838 Mon image, taken in May 2002, the light echo was very bright and compact. At later times, we are seeing dust out to the side of the star, rather than dust that is immediately in front of the star, so the amount of light scattered in our direction is smaller. Hubble astronomers expect the light echo to continue to change its appearance and brightness over the next several years.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_postage-r22455e12dc3a4a9e94eefbf9e1e276ca_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_postage-r22455e12dc3a4a9e94eefbf9e1e276ca_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_poster-228306052915246276</guid><pubDate>Tue, 18 Jul 2006 20:32:49 GMT</pubDate><title><![CDATA[The Expanding Light Echo of Red Supergiant Star  Posters]]></title><link>http://www.zazzle.com/the_expanding_light_echo_of_red_supergiant_star_poster-228306052915246276</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$16.90</price><media:title><![CDATA[The Expanding Light Echo of Red Supergiant Star ]]></media:title><media:description><![CDATA[This image shows a time sequence of Hubble Space Telescope images of the light echo around V838 Mon, taken between May 2002 and October 2004. All six pictures were taken with Hubble&#39;s Advanced Camera for Surveys using filters sensitive to blue, visible, and infrared wavelengths. The apparent expansion of the light echo, as light from the early 2002 outburst of V838 Mon propagates outward into the surrounding dust, is clearly shown.

All of the images are shown at the same scale. Moreover, the images are also shown as they would appear for the same exposure times throughout the sequence. Thus the background stars appear constant in brightness, while the surface brightness of the light echo steadily declines. The fading of the light echo is primarily due to the light-scattering properties of interstellar dust. Consider a street lamp on a foggy night. The halo around the lamp is brightest right next to the lamp, while out to the side it is much fainter. Similarly, in the first V838 Mon image, taken in May 2002, the light echo was very bright and compact. At later times, we are seeing dust out to the side of the star, rather than dust that is immediately in front of the star, so the amount of light scattered in our direction is smaller. Hubble astronomers expect the light echo to continue to change its appearance and brightness over the next several years.]]></media:description><media:price>$16.90</media:price><media:thumbnail url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_poster-re861883e98464f5f9fb5a3f245a474e1_xj4h_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_expanding_light_echo_of_red_supergiant_star_poster-re861883e98464f5f9fb5a3f245a474e1_xj4h_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/m82_chandra_x_ray_postage_stamps-172605066610694022</guid><pubDate>Tue, 18 Jul 2006 20:27:44 GMT</pubDate><title><![CDATA[M82 Chandra: X-ray Postage Stamps]]></title><link>http://www.zazzle.com/m82_chandra_x_ray_postage_stamps-172605066610694022</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[M82 Chandra: X-ray]]></media:title><media:description><![CDATA[Composite image of the active galaxy M82 from x-ray observations by Chandra X-Ray Observatory in three energy bands coded in red (lowest energy x-ray photons), green, and blue (highest energy).
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<item><guid isPermaLink="false">http://www.zazzle.com/chandra_hubble_spitzer_x_ray_visible_infrared_postage-172186410013079217</guid><pubDate>Tue, 18 Jul 2006 20:16:14 GMT</pubDate><title><![CDATA[Chandra/Hubble/Spitzer X-ray/Visible/Infrared  Postage Stamps]]></title><link>http://www.zazzle.com/chandra_hubble_spitzer_x_ray_visible_infrared_postage-172186410013079217</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[Chandra/Hubble/Spitzer X-ray/Visible/Infrared ]]></media:title><media:description><![CDATA[Composite of multi-wavelength images of the active galaxy M82 from the three Great Observatories: Hubble Space Telescope, Chandra X-Ray Observatory, and Spitzer Space Telescope. X-ray data recorded by Chandra (courtesy of NASA/CXC/JHU/D.Strickland) appears here in blue; infrared light recorded by Spitzer (courtesy of NASA/JPL-Caltech/C. Engelbracht (University of Arizona)) appears in red; Hubble&#39;s observations (courtesy of NASA, ESA, and The Hubble Heritage Team (STScI/AURA)) of hydrogen emission appears in orange, and the bluest visible light appears in yellow-green.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/chandra_hubble_spitzer_x_ray_visible_infrared_postage-r06a35eaac4e74bfca549b2ce3bbd93c9_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/chandra_hubble_spitzer_x_ray_visible_infrared_postage-r06a35eaac4e74bfca549b2ce3bbd93c9_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope galaxy, us - nasa]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/chandra_hubble_spitzer_x_ray_visible_infrared_poster-228595119778455225</guid><pubDate>Tue, 18 Jul 2006 20:09:15 GMT</pubDate><title><![CDATA[Chandra/Hubble/Spitzer X-ray/Visible/Infrared  Poster]]></title><link>http://www.zazzle.com/chandra_hubble_spitzer_x_ray_visible_infrared_poster-228595119778455225</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$20.35</price><media:title><![CDATA[Chandra/Hubble/Spitzer X-ray/Visible/Infrared ]]></media:title><media:description><![CDATA[Composite of multi-wavelength images of the active galaxy M82 from the three Great Observatories: Hubble Space Telescope, Chandra X-Ray Observatory, and Spitzer Space Telescope. X-ray data recorded by Chandra (courtesy of NASA/CXC/JHU/D.Strickland) appears here in blue; infrared light recorded by Spitzer (courtesy of NASA/JPL-Caltech/C. Engelbracht (University of Arizona)) appears in red; Hubble&#39;s observations (courtesy of NASA, ESA, and The Hubble Heritage Team (STScI/AURA)) of hydrogen emission appears in orange, and the bluest visible light appears in yellow-green.]]></media:description><media:price>$20.35</media:price><media:thumbnail url="http://rlv.zcache.com/chandra_hubble_spitzer_x_ray_visible_infrared_poster-ra7115b2a4c944f5d88ae5730ed839ed9_az215_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/chandra_hubble_spitzer_x_ray_visible_infrared_poster-ra7115b2a4c944f5d88ae5730ed839ed9_az215_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, small magellanic cloud, ngc spitzer]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_tshirt-235214259754652719</guid><pubDate>Tue, 18 Jul 2006 05:15:40 GMT</pubDate><title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows T Shirt]]></title><link>http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_tshirt-235214259754652719</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$23.95</price><media:title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows]]></media:title><media:description><![CDATA[This image of star cluster NGC 346 and its surrounding star-formation region was taken in July 2004 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope. Located 210,000 light-years away in the Small Magellanic Cloud (SMC), a satellite galaxy of our Milky Way, the cluster is one of the most dynamic and intricately detailed star-forming regions in space. A dramatic structure of arched, ragged filaments with a distinct ridge encircles the cluster.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_tshirt-ref72e47873124f85b1bbe45691a4c117_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_tshirt-ref72e47873124f85b1bbe45691a4c117_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, small magellanic cloud, ngc 346, star cluster]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_postage-172565767639836258</guid><pubDate>Tue, 18 Jul 2006 05:12:41 GMT</pubDate><title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows Stamp]]></title><link>http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_postage-172565767639836258</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows]]></media:title><media:description><![CDATA[This image of star cluster NGC 346 and its surrounding star-formation region was taken in July 2004 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope. Located 210,000 light-years away in the Small Magellanic Cloud (SMC), a satellite galaxy of our Milky Way, the cluster is one of the most dynamic and intricately detailed star-forming regions in space. A dramatic structure of arched, ragged filaments with a distinct ridge encircles the cluster.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_postage-r96ea9c125ee1487a992457a08e3361b5_xjswm_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_postage-r96ea9c125ee1487a992457a08e3361b5_xjswm_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, small magellanic cloud, ngc 346, star cluster]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_tshirt-235660229026640300</guid><pubDate>Mon, 17 Jul 2006 23:23:14 GMT</pubDate><title><![CDATA[&quot;Light Echo&quot; Illuminates Dust Near Supergiant Star Shirt]]></title><link>http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_tshirt-235660229026640300</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$23.95</price><media:title><![CDATA["Light Echo" Illuminates Dust Near Supergiant Star]]></media:title><media:description><![CDATA[&quot;Starry Night,&quot; Vincent van Gogh&#39;s famous painting, is renowned for its bold whorls of light sweeping across a raging night sky. Although this image of the heavens came only from the artist&#39;s restless imagination, a new picture from NASA&#39;s Hubble Space Telescope bears remarkable similarities to the van Gogh work, complete with never-before-seen spirals of dust swirling across trillions of miles of interstellar space. This image, obtained with the Advanced Camera for Surveys on February 8, 2004, is Hubble&#39;s latest view of an expanding halo of light around a distant star, named V838 Monocerotis (V838 Mon). The illumination of interstellar dust comes from the red supergiant star at the middle of the image, which gave off a flashbulb-like pulse of light two years ago. V838 Mon is located about 20,000 light-years away from Earth in the direction of the constellation Monoceros, placing the star at the outer edge of our Milky Way galaxy. Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image shows swirls or eddies in the dusty cloud for the first time. These eddies are probably caused by turbulence in the dust and gas around the star as they slowly expand away. The dust and gas were likely ejected from the star in a previous explosion, similar to the 2002 event, which occurred some tens of thousands of years ago. The surrounding dust remained invisible and unsuspected until suddenly illuminated by the brilliant explosion of the central star two years ago. The Hubble telescope has imaged V838 Mon and its light echo several times since the star&#39;s outburst in January 2002, in order to follow the constantly changing appearance of the dust as the pulse of illumination continues to expand away from the star at the speed of light. During the outburst event, the normally faint star suddenly brightened, becoming 600,000 times more luminous than our Sun. It was thus one of the brightest stars in the entire Milky Way, until it faded away again in April 2002. The star has some similarities to a class of objects called &quot;novae,&quot; which suddenly increase in brightness due to thermonuclear explosions at their surfaces; however, the detailed behavior of V838 Mon, in particular its extremely red color, has been completely different from any previously known nova. Nature&#39;s own piece of performance art, this structure will continue to change its appearance in coming years as the light from the stellar outburst continues to propagate outward and bounce off more distant black clouds of dust. Astronomers expect the echoes to remain visible for at least the rest of the current decade.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_tshirt-rfae067027dac4e3ebd662e4342d4863b_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_tshirt-rfae067027dac4e3ebd662e4342d4863b_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_mug-168979785682330616</guid><pubDate>Mon, 17 Jul 2006 08:25:16 GMT</pubDate><title><![CDATA[&quot;Light Echo&quot; Illuminates Dust Near Supergiant Star Coffee Mug]]></title><link>http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_mug-168979785682330616</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA["Light Echo" Illuminates Dust Near Supergiant Star]]></media:title><media:description><![CDATA[&quot;Starry Night,&quot; Vincent van Gogh&#39;s famous painting, is renowned for its bold whorls of light sweeping across a raging night sky. Although this image of the heavens came only from the artist&#39;s restless imagination, a new picture from NASA&#39;s Hubble Space Telescope bears remarkable similarities to the van Gogh work, complete with never-before-seen spirals of dust swirling across trillions of miles of interstellar space.

This image, obtained with the Advanced Camera for Surveys on February 8, 2004, is Hubble&#39;s latest view of an expanding halo of light around a distant star, named V838 Monocerotis (V838 Mon). The illumination of interstellar dust comes from the red supergiant star at the middle of the image, which gave off a flashbulb-like pulse of light two years ago. V838 Mon is located about 20,000 light-years away from Earth in the direction of the constellation Monoceros, placing the star at the outer edge of our Milky Way galaxy.

Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image shows swirls or eddies in the dusty cloud for the first time. These eddies are probably caused by turbulence in the dust and gas around the star as they slowly expand away. The dust and gas were likely ejected from the star in a previous explosion, similar to the 2002 event, which occurred some tens of thousands of years ago. The surrounding dust remained invisible and unsuspected until suddenly illuminated by the brilliant explosion of the central star two years ago.

The Hubble telescope has imaged V838 Mon and its light echo several times since the star&#39;s outburst in January 2002, in order to follow the constantly changing appearance of the dust as the pulse of illumination continues to expand away from the star at the speed of light. During the outburst event, the normally faint star suddenly brightened, becoming 600,000 times more luminous than our Sun. It was thus one of the brightest stars in the entire Milky Way, until it faded away again in April 2002. The star has some similarities to a class of objects called &quot;novae,&quot; which suddenly increase in brightness due to thermonuclear explosions at their surfaces; however, the detailed behavior of V838 Mon, in particular its extremely red color, has been completely different from any previously known nova.

Nature&#39;s own piece of performance art, this structure will continue to change its appearance in coming years as the light from the stellar outburst continues to propagate outward and bounce off more distant black clouds of dust. Astronomers expect the echoes to remain visible for at least the rest of the current decade.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_mug-rea1bc2df14084f94a8f3b17259240bbf_x7jyq_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_mug-rea1bc2df14084f94a8f3b17259240bbf_x7jyq_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_postage-172089326963866385</guid><pubDate>Mon, 17 Jul 2006 08:17:56 GMT</pubDate><title><![CDATA[&quot;Light Echo&quot; Illuminates Dust Near Supergiant Star Postage]]></title><link>http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_postage-172089326963866385</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/light_echo_illuminates_dust_near_supergiant_star_postage-172089326963866385" id="page_zWidget19-title" class="gbb-productTitle" title="&amp;quot;Light Echo&amp;quot; Illuminates Dust Near Supergiant Star Postage">&quot;Light Echo&quot; Illuminates Dust Near Supergiant Star Postage</a>
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</div>]]></description><price>$22.95</price><media:title><![CDATA["Light Echo" Illuminates Dust Near Supergiant Star]]></media:title><media:description><![CDATA[&quot;Starry Night,&quot; Vincent van Gogh&#39;s famous painting, is renowned for its bold whorls of light sweeping across a raging night sky. Although this image of the heavens came only from the artist&#39;s restless imagination, a new picture from NASA&#39;s Hubble Space Telescope bears remarkable similarities to the van Gogh work, complete with never-before-seen spirals of dust swirling across trillions of miles of interstellar space.

This image, obtained with the Advanced Camera for Surveys on February 8, 2004, is Hubble&#39;s latest view of an expanding halo of light around a distant star, named V838 Monocerotis (V838 Mon). The illumination of interstellar dust comes from the red supergiant star at the middle of the image, which gave off a flashbulb-like pulse of light two years ago. V838 Mon is located about 20,000 light-years away from Earth in the direction of the constellation Monoceros, placing the star at the outer edge of our Milky Way galaxy.

Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image shows swirls or eddies in the dusty cloud for the first time. These eddies are probably caused by turbulence in the dust and gas around the star as they slowly expand away. The dust and gas were likely ejected from the star in a previous explosion, similar to the 2002 event, which occurred some tens of thousands of years ago. The surrounding dust remained invisible and unsuspected until suddenly illuminated by the brilliant explosion of the central star two years ago.

The Hubble telescope has imaged V838 Mon and its light echo several times since the star&#39;s outburst in January 2002, in order to follow the constantly changing appearance of the dust as the pulse of illumination continues to expand away from the star at the speed of light. During the outburst event, the normally faint star suddenly brightened, becoming 600,000 times more luminous than our Sun. It was thus one of the brightest stars in the entire Milky Way, until it faded away again in April 2002. The star has some similarities to a class of objects called &quot;novae,&quot; which suddenly increase in brightness due to thermonuclear explosions at their surfaces; however, the detailed behavior of V838 Mon, in particular its extremely red color, has been completely different from any previously known nova.

Nature&#39;s own piece of performance art, this structure will continue to change its appearance in coming years as the light from the stellar outburst continues to propagate outward and bounce off more distant black clouds of dust. Astronomers expect the echoes to remain visible for at least the rest of the current decade.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_postage-rc3ea0b4088e14f4da908083a496e28bf_xjswm_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/light_echo_illuminates_dust_near_supergiant_star_postage-rc3ea0b4088e14f4da908083a496e28bf_xjswm_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, star]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_mugs-168829269402445943</guid><pubDate>Mon, 17 Jul 2006 07:21:13 GMT</pubDate><title><![CDATA[Barred Spiral Galaxy NGC 1300 Mugs]]></title><link>http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_mugs-168829269402445943</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[Barred Spiral Galaxy NGC 1300]]></media:title><media:description><![CDATA[One of the largest Hubble Space Telescope images ever made of a complete galaxy.

The Hubble telescope captured a display of starlight, glowing gas, and silhouetted dark clouds of interstellar dust in this 4-foot-by-8-foot image of the barred spiral galaxy NGC 1300. NGC 1300 is considered to be prototypical of barred spiral galaxies. Barred spirals differ from normal spiral galaxies in that the arms of the galaxy do not spiral all the way into the center, but are connected to the two ends of a straight bar of stars containing the nucleus at its center.

At Hubble&#39;s resolution, a myriad of fine details, some of which have never before been seen, is seen throughout the galaxy&#39;s arms, disk, bulge, and nucleus. Blue and red supergiant stars, star clusters, and star-forming regions are well resolved across the spiral arms, and dust lanes trace out fine structures in the disk and bar. Numerous more distant galaxies are visible in the background, and are seen even through the densest regions of NGC 1300.

In the core of the larger spiral structure of NGC 1300, the nucleus shows its own extraordinary and distinct &quot;grand-design&quot; spiral structure that is about 3,300 light-years (1 kiloparsec) long. Only galaxies with large-scale bars appear to have these grand-design inner disks ? a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through the grand-design disk, where it can potentially fuel a central black hole. NGC 1300 is not known to have an active nucleus, however, indicating either that there is no black hole, or that it is not accreting matter.

The image was constructed from exposures taken in September 2004 by the Advanced Camera for Surveys onboard Hubble in four filters. Starlight and dust are seen in blue, visible, and infrared light. Bright star clusters are highlighted in red by their associated emission from glowing hydrogen gas. Due to the galaxy&#39;s large size, two adjacent pointings of the telescope were necessary to cover the extent of the spiral arms. The galaxy lies roughly 69 million light-years away (21 megaparsecs) in the direction of the constellation Eridanus.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_mugs-ra9e46824245f4d1697a261218cfcba12_x7j1l_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_mugs-ra9e46824245f4d1697a261218cfcba12_x7j1l_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, barred spiral galaxy, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_coffee_mug-168822674293608108</guid><pubDate>Mon, 17 Jul 2006 07:15:28 GMT</pubDate><title><![CDATA[The Majestic Sombrero Galaxy (M104) Coffee Mug]]></title><link>http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_coffee_mug-168822674293608108</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[The Majestic Sombrero Galaxy (M104)]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope has trained its razor-sharp eye on one of the universe&#39;s most stately and photogenic galaxies, the Sombrero galaxy, Messier 104 (M104). The galaxy&#39;s is a brilliant white, bulbous core encircled by the thick dust lanes comprising the spiral structure of the galaxy. As seen from Earth, the galaxy is tilted nearly edge-on. We view it from just six degrees north of its equatorial plane. This brilliant galaxy was named the Sombrero because of its resemblance to the broad rim and high-topped Mexican hat.

At a relatively bright magnitude of +8, M104 is just beyond the limit of naked-eye visibility and is easily seen through small telescopes. The Sombrero lies at the southern edge of the rich Virgo cluster of galaxies and is one of the most massive objects in that group, equivalent to 800 billion suns. The galaxy is 50,000 light-years across and is located 28 million light-years from Earth.

Hubble easily resolves M104&#39;s rich system of globular clusters, estimated to be nearly 2,000 in number ? 10 times as many as orbit our Milky Way galaxy. The ages of the clusters are similar to the clusters in the Milky Way, ranging from 10-13 billion years old. Embedded in the bright core of M104 is a smaller disk, which is tilted relative to the large disk. X-ray emission suggests that there is material falling into the compact core, where a 1-billion-solar-mass black hole resides.

In the 19th century, some astronomers speculated that M104 was simply an edge-on disk of luminous gas surrounding a young star, which is prototypical of the genesis of our solar system. But in 1912, astronomer V. M. Slipher discovered that the hat-like object appeared to be rushing away from us at 700 miles per second. This enormous velocity offered some of the earliest clues that the Sombrero was really another galaxy, and that the universe was expanding in all directions.

The Hubble Heritage Team took these observations in May-June 2003 with the space telescope&#39;s Advanced Camera for Surveys. Images were taken in three filters (red, green, and blue) to yield a natural-color image. The team took six pictures of the galaxy and then stitched them together to create the final composite image. One of the largest Hubble mosaics ever assembled, this magnificent galaxy has an apparent diameter that is nearly one-fifth the diameter of the full moon.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_coffee_mug-r8f267c1d485748f19a7245dad7c6742a_x7j56_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_coffee_mug-r8f267c1d485748f19a7245dad7c6742a_x7j56_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, sombrero galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubbles_largest_galaxy_portrait_coffee_mug-168300015338491980</guid><pubDate>Mon, 17 Jul 2006 07:09:34 GMT</pubDate><title><![CDATA[Hubble&#39;s Largest Galaxy Portrait Coffee Mug]]></title><link>http://www.zazzle.com/hubbles_largest_galaxy_portrait_coffee_mug-168300015338491980</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[Hubble's Largest Galaxy Portrait]]></media:title><media:description><![CDATA[Giant galaxies weren?t assembled in a day. Neither was this Hubble Space Telescope image of the face-on spiral galaxy Messier 101 (M101). It is the largest and most detailed photo of a spiral galaxy that has ever been released from Hubble. The galaxy?s portrait is actually composed of 51 individual exposures taken with Hubble&#39;s Advanced Camera for Surveys and the Wide Field and Planetary Camera 2 in March 1994, September 1994, June 1999, November 2002, and January 2003. The newly composed image also includes elements from images from ground-based photos.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_coffee_mug-re910a726cb6d48d6a278950b4f82516e_x7j1l_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_coffee_mug-re910a726cb6d48d6a278950b4f82516e_x7j1l_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_mug-168431401962531325</guid><pubDate>Mon, 17 Jul 2006 07:00:22 GMT</pubDate><title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy Coffee Mugs]]></title><link>http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_mug-168431401962531325</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.95</price><media:title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy]]></media:title><media:description><![CDATA[This sharpest-ever image of the Whirlpool Galaxy, taken in January 2005 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope, illustrates a spiral galaxy&#39;s grand design, from its curving spiral arms, where young stars reside, to its yellowish central core, a home of older stars. The galaxy is nicknamed the Whirlpool because of its swirling structure.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_mug-r6e23eb04ebe6436fa00146b90a37457d_x7j1l_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_mug-r6e23eb04ebe6436fa00146b90a37457d_x7j1l_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, whirlpool galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

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</div>]]></description><price>$22.95</price><media:title><![CDATA[Hubble's Largest Galaxy Portrait ]]></media:title><media:description><![CDATA[Giant galaxies weren?t assembled in a day. Neither was this Hubble Space Telescope image of the face-on spiral galaxy Messier 101 (M101). It is the largest and most detailed photo of a spiral galaxy that has ever been released from Hubble. The galaxy?s portrait is actually composed of 51 individual exposures taken with Hubble&#39;s Advanced Camera for Surveys and the Wide Field and Planetary Camera 2 in March 1994, September 1994, June 1999, November 2002, and January 2003. The newly composed image also includes elements from images from ground-based photos.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_postage_stamps-ra5e706284faa4aff84c4e3fa85d1477d_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_postage_stamps-ra5e706284faa4aff84c4e3fa85d1477d_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

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				<a href="http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_t_shirts-235837977475043898" id="page_zWidget26-title" class="gbb-productTitle" title="Barred Spiral Galaxy NGC 1300 T-shirts">Barred Spiral Galaxy NGC 1300 T-shirts</a>
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</div>]]></description><price>$23.95</price><media:title><![CDATA[Barred Spiral Galaxy NGC 1300]]></media:title><media:description><![CDATA[One of the largest Hubble Space Telescope images ever made of a complete galaxy.

The Hubble telescope captured a display of starlight, glowing gas, and silhouetted dark clouds of interstellar dust in this 4-foot-by-8-foot image of the barred spiral galaxy NGC 1300. NGC 1300 is considered to be prototypical of barred spiral galaxies. Barred spirals differ from normal spiral galaxies in that the arms of the galaxy do not spiral all the way into the center, but are connected to the two ends of a straight bar of stars containing the nucleus at its center.

At Hubble&#39;s resolution, a myriad of fine details, some of which have never before been seen, is seen throughout the galaxy&#39;s arms, disk, bulge, and nucleus. Blue and red supergiant stars, star clusters, and star-forming regions are well resolved across the spiral arms, and dust lanes trace out fine structures in the disk and bar. Numerous more distant galaxies are visible in the background, and are seen even through the densest regions of NGC 1300.

In the core of the larger spiral structure of NGC 1300, the nucleus shows its own extraordinary and distinct &quot;grand-design&quot; spiral structure that is about 3,300 light-years (1 kiloparsec) long. Only galaxies with large-scale bars appear to have these grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through the grand-design disk, where it can potentially fuel a central black hole. NGC 1300 is not known to have an active nucleus, however, indicating either that there is no black hole, or that it is not accreting matter.

The image was constructed from exposures taken in September 2004 by the Advanced Camera for Surveys onboard Hubble in four filters. Starlight and dust are seen in blue, visible, and infrared light. Bright star clusters are highlighted in red by their associated emission from glowing hydrogen gas. Due to the galaxy&#39;s large size, two adjacent pointings of the telescope were necessary to cover the extent of the spiral arms. The galaxy lies roughly 69 million light-years away (21 megaparsecs) in the direction of the constellation Eridanus.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_t_shirts-r04214e5cb60f4f53b3a9c92e7f0f1286_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_t_shirts-r04214e5cb60f4f53b3a9c92e7f0f1286_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, barred spiral galaxy, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_stamp-172548086582255083</guid><pubDate>Mon, 17 Jul 2006 05:59:10 GMT</pubDate><title><![CDATA[Barred Spiral Galaxy NGC 1300 Stamp]]></title><link>http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_stamp-172548086582255083</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget27-preview" src="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_stamp-r6d5a19cd2d1e428888781e3e29e7cd45_xjsw1_8byvr_152.jpg" alt="Barred Spiral Galaxy NGC 1300 Stamp" title="Barred Spiral Galaxy NGC 1300 Stamp" class="dX-realviewImage" />
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</div>]]></description><price>$22.95</price><media:title><![CDATA[Barred Spiral Galaxy NGC 1300]]></media:title><media:description><![CDATA[One of the largest Hubble Space Telescope images ever made of a complete galaxy is being unveiled today at the American Astronomical Society meeting in San Diego, Calif.

The Hubble telescope captured a display of starlight, glowing gas, and silhouetted dark clouds of interstellar dust in this 4-foot-by-8-foot image of the barred spiral galaxy NGC 1300. NGC 1300 is considered to be prototypical of barred spiral galaxies. Barred spirals differ from normal spiral galaxies in that the arms of the galaxy do not spiral all the way into the center, but are connected to the two ends of a straight bar of stars containing the nucleus at its center.

At Hubble&#39;s resolution, a myriad of fine details, some of which have never before been seen, is seen throughout the galaxy&#39;s arms, disk, bulge, and nucleus. Blue and red supergiant stars, star clusters, and star-forming regions are well resolved across the spiral arms, and dust lanes trace out fine structures in the disk and bar. Numerous more distant galaxies are visible in the background, and are seen even through the densest regions of NGC 1300.

In the core of the larger spiral structure of NGC 1300, the nucleus shows its own extraordinary and distinct &quot;grand-design&quot; spiral structure that is about 3,300 light-years (1 kiloparsec) long. Only galaxies with large-scale bars appear to have these grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through the grand-design disk, where it can potentially fuel a central black hole. NGC 1300 is not known to have an active nucleus, however, indicating either that there is no black hole, or that it is not accreting matter.

The image was constructed from exposures taken in September 2004 by the Advanced Camera for Surveys onboard Hubble in four filters. Starlight and dust are seen in blue, visible, and infrared light. Bright star clusters are highlighted in red by their associated emission from glowing hydrogen gas. Due to the galaxy&#39;s large size, two adjacent pointings of the telescope were necessary to cover the extent of the spiral arms. The galaxy lies roughly 69 million light-years away (21 megaparsecs) in the direction of the constellation Eridanus.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_stamp-r6d5a19cd2d1e428888781e3e29e7cd45_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_stamp-r6d5a19cd2d1e428888781e3e29e7cd45_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_stamp-172954827546555853</guid><pubDate>Mon, 17 Jul 2006 05:52:14 GMT</pubDate><title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy Stamp]]></title><link>http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_stamp-172954827546555853</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy]]></media:title><media:description><![CDATA[This sharpest-ever image of the Whirlpool Galaxy, taken in January 2005 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope, illustrates a spiral galaxy&#39;s grand design, from its curving spiral arms, where young stars reside, to its yellowish central core, a home of older stars. The galaxy is nicknamed the Whirlpool because of its swirling structure.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_stamp-r35ee36a93ae742e7a5ecb18e98b01dbe_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_stamp-r35ee36a93ae742e7a5ecb18e98b01dbe_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, whirlpool galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_shirt-235213234508168509</guid><pubDate>Mon, 17 Jul 2006 05:48:47 GMT</pubDate><title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy Shirt]]></title><link>http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_shirt-235213234508168509</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget29-preview" src="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_shirt-rca93ecf6e1ae4248b55bf21c31781538_va6lr_152.jpg" alt="Whirlpool Galaxy (M51) and Companion Galaxy Shirt" title="Whirlpool Galaxy (M51) and Companion Galaxy Shirt" class="dX-realviewImage" />
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</div>]]></description><price>$23.95</price><media:title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy]]></media:title><media:description><![CDATA[This sharpest-ever image of the Whirlpool Galaxy, taken in January 2005 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope, illustrates a spiral galaxy&#39;s grand design, from its curving spiral arms, where young stars reside, to its yellowish central core, a home of older stars. The galaxy is nicknamed the Whirlpool because of its swirling structure.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_shirt-rca93ecf6e1ae4248b55bf21c31781538_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_shirt-rca93ecf6e1ae4248b55bf21c31781538_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, whirlpool galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_t_shirt-235678561373482478</guid><pubDate>Mon, 17 Jul 2006 05:18:34 GMT</pubDate><title><![CDATA[The Majestic Sombrero Galaxy (M104) T-shirt]]></title><link>http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_t_shirt-235678561373482478</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_t_shirt-235678561373482478" id="page_zWidget30-title" class="gbb-productTitle" title="The Majestic Sombrero Galaxy (M104) T-shirt">The Majestic Sombrero Galaxy (M104) T-shirt</a>
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</div>]]></description><price>$23.95</price><media:title><![CDATA[The Majestic Sombrero Galaxy (M104)]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope has trained its razor-sharp eye on one of the universe&#39;s most stately and photogenic galaxies, the Sombrero galaxy, Messier 104 (M104). The galaxy&#39;s is a brilliant white, bulbous core encircled by the thick dust lanes comprising the spiral structure of the galaxy. As seen from Earth, the galaxy is tilted nearly edge-on. We view it from just six degrees north of its equatorial plane. This brilliant galaxy was named the Sombrero because of its resemblance to the broad rim and high-topped Mexican hat.

At a relatively bright magnitude of +8, M104 is just beyond the limit of naked-eye visibility and is easily seen through small telescopes. The Sombrero lies at the southern edge of the rich Virgo cluster of galaxies and is one of the most massive objects in that group, equivalent to 800 billion suns. The galaxy is 50,000 light-years across and is located 28 million light-years from Earth.

Hubble easily resolves M104&#39;s rich system of globular clusters, estimated to be nearly 2,000 in number — 10 times as many as orbit our Milky Way galaxy. The ages of the clusters are similar to the clusters in the Milky Way, ranging from 10-13 billion years old. Embedded in the bright core of M104 is a smaller disk, which is tilted relative to the large disk. X-ray emission suggests that there is material falling into the compact core, where a 1-billion-solar-mass black hole resides.

In the 19th century, some astronomers speculated that M104 was simply an edge-on disk of luminous gas surrounding a young star, which is prototypical of the genesis of our solar system. But in 1912, astronomer V. M. Slipher discovered that the hat-like object appeared to be rushing away from us at 700 miles per second. This enormous velocity offered some of the earliest clues that the Sombrero was really another galaxy, and that the universe was expanding in all directions.

The Hubble Heritage Team took these observations in May-June 2003 with the space telescope&#39;s Advanced Camera for Surveys. Images were taken in three filters (red, green, and blue) to yield a natural-color image. The team took six pictures of the galaxy and then stitched them together to create the final composite image. One of the largest Hubble mosaics ever assembled, this magnificent galaxy has an apparent diameter that is nearly one-fifth the diameter of the full moon.]]></media:description><media:price>$23.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_t_shirt-r294704faffa549499348df652b502584_va6lr_152.jpg" /><media:content url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_t_shirt-r294704faffa549499348df652b502584_va6lr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, sombrero galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_stamp-172507882152091583</guid><pubDate>Mon, 17 Jul 2006 04:59:17 GMT</pubDate><title><![CDATA[The Majestic Sombrero Galaxy (M104) Stamp]]></title><link>http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_stamp-172507882152091583</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[The Majestic Sombrero Galaxy (M104)]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope has trained its razor-sharp eye on one of the universe&#39;s most stately and photogenic galaxies, the Sombrero galaxy, Messier 104 (M104). The galaxy&#39;s is a brilliant white, bulbous core encircled by the thick dust lanes comprising the spiral structure of the galaxy. As seen from Earth, the galaxy is tilted nearly edge-on. We view it from just six degrees north of its equatorial plane. This brilliant galaxy was named the Sombrero because of its resemblance to the broad rim and high-topped Mexican hat. At a relatively bright magnitude of +8, M104 is just beyond the limit of naked-eye visibility and is easily seen through small telescopes. The Sombrero lies at the southern edge of the rich Virgo cluster of galaxies and is one of the most massive objects in that group, equivalent to 800 billion suns. The galaxy is 50,000 light-years across and is located 28 million light-years from Earth. Hubble easily resolves M104&#39;s rich system of globular clusters, estimated to be nearly 2,000 in number — 10 times as many as orbit our Milky Way galaxy. The ages of the clusters are similar to the clusters in the Milky Way, ranging from 10-13 billion years old. Embedded in the bright core of M104 is a smaller disk, which is tilted relative to the large disk. X-ray emission suggests that there is material falling into the compact core, where a 1-billion-solar-mass black hole resides. In the 19th century, some astronomers speculated that M104 was simply an edge-on disk of luminous gas surrounding a young star, which is prototypical of the genesis of our solar system. But in 1912, astronomer V. M. Slipher discovered that the hat-like object appeared to be rushing away from us at 700 miles per second. This enormous velocity offered some of the earliest clues that the Sombrero was really another galaxy, and that the universe was expanding in all directions. The Hubble Heritage Team took these observations in May-June 2003 with the space telescope&#39;s Advanced Camera for Surveys. Images were taken in three filters (red, green, and blue) to yield a natural-color image. The team took six pictures of the galaxy and then stitched them together to create the final composite image. One of the largest Hubble mosaics ever assembled, this magnificent galaxy has an apparent diameter that is nearly one-fifth the diameter of the full moon.]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_stamp-r12190af8fce4417383fc8a5cf1094a15_xjsw1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_stamp-r12190af8fce4417383fc8a5cf1094a15_xjsw1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, sombrero galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_magnificent_starburst_galaxy_messier_82_m82_poster-228945277405124929</guid><pubDate>Sun, 16 Jul 2006 00:01:14 GMT</pubDate><title><![CDATA[The Magnificent Starburst Galaxy, Messier 82 (M82) Posters]]></title><link>http://www.zazzle.com/the_magnificent_starburst_galaxy_messier_82_m82_poster-228945277405124929</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$20.95</price><media:title><![CDATA[The Magnificent Starburst Galaxy, Messier 82 (M82)]]></media:title><media:description><![CDATA[This mosaic image is the sharpest wide-angle view ever obtained of M82. The galaxy is remarkable for its bright blue disk, webs of shredded clouds, and fiery-looking plumes of glowing hydrogen blasting out of its central regions.

Throughout the galaxy&#39;s center, young stars are being born 10 times faster than they are inside our entire Milky Way Galaxy. The resulting huge concentration of young stars carved into the gas and dust at the galaxy&#39;s center. The fierce galactic superwind generated from these stars compresses enough gas to make millions of more stars.

In M82, young stars are crammed into tiny but massive star clusters. These, in turn, congregate by the dozens to make the bright patches, or &quot;starburst clumps,&quot; in the central parts of M82. The clusters in the clumps can only be distinguished in the sharp Hubble images. Most of the pale, white objects sprinkled around the body of M82 that look like fuzzy stars are actually individual star clusters about 20 light-years across and contain up to a million stars.

The rapid rate of star formation in this galaxy eventually will be self-limiting. When star formation becomes too vigorous, it will consume or destroy the material needed to make more stars. The starburst then will subside, probably in a few tens of millions of years.

Located 12 million light-years away, M82 appears high in the northern spring sky in the direction of the constellation Ursa Major, the Great Bear. It is also called the &quot;Cigar Galaxy&quot; because of the elliptical shape produced by the oblique tilt of its starry disk relative to our line of sight.

The observation was made in March 2006, with the Advanced Camera for Surveys&#39; Wide Field Channel. Astronomers assembled this six-image composite mosaic by combining exposures taken with four colored filters that capture starlight from visible and infrared wavelengths as well as the light from the glowing hydrogen filaments.]]></media:description><media:price>$20.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_magnificent_starburst_galaxy_messier_82_m82_poster-re26c7350f5bd4892a2a612fcb9a86bd4_a6vzo_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_magnificent_starburst_galaxy_messier_82_m82_poster-re26c7350f5bd4892a2a612fcb9a86bd4_a6vzo_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_poster-228564762955092411</guid><pubDate>Sat, 15 Jul 2006 23:43:56 GMT</pubDate><title><![CDATA[The Majestic Sombrero Galaxy (M104) Poster]]></title><link>http://www.zazzle.com/the_majestic_sombrero_galaxy_m104_poster-228564762955092411</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$20.70</price><media:title><![CDATA[The Majestic Sombrero Galaxy (M104)]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope has trained its razor-sharp eye on one of the universe&#39;s most stately and photogenic galaxies, the Sombrero galaxy, Messier 104 (M104). The galaxy&#39;s is a brilliant white, bulbous core encircled by the thick dust lanes comprising the spiral structure of the galaxy. As seen from Earth, the galaxy is tilted nearly edge-on. We view it from just six degrees north of its equatorial plane. This brilliant galaxy was named the Sombrero because of its resemblance to the broad rim and high-topped Mexican hat.

At a relatively bright magnitude of +8, M104 is just beyond the limit of naked-eye visibility and is easily seen through small telescopes. The Sombrero lies at the southern edge of the rich Virgo cluster of galaxies and is one of the most massive objects in that group, equivalent to 800 billion suns. The galaxy is 50,000 light-years across and is located 28 million light-years from Earth.

Hubble easily resolves M104&#39;s rich system of globular clusters, estimated to be nearly 2,000 in number — 10 times as many as orbit our Milky Way galaxy. The ages of the clusters are similar to the clusters in the Milky Way, ranging from 10-13 billion years old. Embedded in the bright core of M104 is a smaller disk, which is tilted relative to the large disk. X-ray emission suggests that there is material falling into the compact core, where a 1-billion-solar-mass black hole resides.

In the 19th century, some astronomers speculated that M104 was simply an edge-on disk of luminous gas surrounding a young star, which is prototypical of the genesis of our solar system. But in 1912, astronomer V. M. Slipher discovered that the hat-like object appeared to be rushing away from us at 700 miles per second. This enormous velocity offered some of the earliest clues that the Sombrero was really another galaxy, and that the universe was expanding in all directions.

The Hubble Heritage Team took these observations in May-June 2003 with the space telescope&#39;s Advanced Camera for Surveys. Images were taken in three filters (red, green, and blue) to yield a natural-color image. The team took six pictures of the galaxy and then stitched them together to create the final composite image. One of the largest Hubble mosaics ever assembled, this magnificent galaxy has an apparent diameter that is nearly one-fifth the diameter of the full moon.]]></media:description><media:price>$20.70</media:price><media:thumbnail url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_poster-r5c04481780dc462892d4aa559177a6c5_aigfo_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_majestic_sombrero_galaxy_m104_poster-r5c04481780dc462892d4aa559177a6c5_aigfo_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/blue_stars_ring_nucleus_of_galaxy_am_0644_741_poster-228173515287300721</guid><pubDate>Sat, 15 Jul 2006 23:36:48 GMT</pubDate><title><![CDATA[Blue Stars Ring Nucleus of Galaxy AM 0644-741 Posters]]></title><link>http://www.zazzle.com/blue_stars_ring_nucleus_of_galaxy_am_0644_741_poster-228173515287300721</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$22.95</price><media:title><![CDATA[Blue Stars Ring Nucleus of Galaxy AM 0644-741]]></media:title><media:description><![CDATA[Resembling a diamond-encrusted bracelet, a ring of brilliant blue star clusters wraps around the yellowish nucleus of what was once a normal spiral galaxy in this new image from NASA&#39;s Hubble Space Telescope (HST). This image is being released to commemorate the 14th anniversary of Hubble&#39;s launch on April 24, 1990 and its deployment from the space shuttle Discovery on April 25, 1990.

The sparkling blue ring is 150,000 light-years in diameter, making it larger than our entire home galaxy, the Milky Way. The galaxy, cataloged as AM 0644-741, is a member of the class of so-called &quot;ring galaxies.&quot; It lies 300 million light-years away in the direction of the southern constellation Volans.

Ring galaxies are an especially striking example of how collisions between galaxies can dramatically change their structure, while also triggering the formation of new stars. They arise from a particular type of collision, in which one galaxy (the &quot;intruder&quot;) plunges directly through the disk of another one (the &quot;target&quot;). In the case of AM 0644-741, the galaxy that pierced through the ring galaxy is out of the image but visible in larger-field images. The soft spiral galaxy that is visible to the left of the ring galaxy in the image is a coincidental background galaxy that is not interacting with the ring.

The resulting gravitational shock imparted due to the collision drastically changes the orbits of stars and gas in the target galaxy&#39;s disk, causing them to rush outward, somewhat like ripples in a pond after a large rock has been thrown in. As the ring plows outward into its surroundings, gas clouds collide and are compressed. The clouds can then contract under their own gravity, collapse, and form an abundance of new stars.

The rampant star formation explains why the ring is so blue: It is continuously forming massive, young, hot stars, which are blue in color. Another sign of robust star formation is the pink regions along the ring. These are rarefied clouds of glowing hydrogen gas, fluorescing because of the strong ultraviolet light from the newly formed massive stars.

Anyone who lives on planets embedded in the ring would be treated to a view of a brilliant band of blue stars arching across the heavens. The view would be relatively short-lived because theoretical studies indicate that the blue ring will not continue to expand forever. After about 300 million years, it will reach a maximum radius, and then begin to disintegrate.

The Hubble Heritage Team used the Hubble Advanced Camera for Surveys to take this image in January 2004. The team used a combination of four separate filters that isolate blue, green, red, and near-infrared light to create the color image.

The Space Telescope Science Institute (STScI) is operated by the Association of Universities for Research in Astronomy, Inc. (AURA), for NASA, under contract with the Goddard Space Flight Center, Greenbelt, MD. The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency (ESA).]]></media:description><media:price>$22.95</media:price><media:thumbnail url="http://rlv.zcache.com/blue_stars_ring_nucleus_of_galaxy_am_0644_741_poster-r857b427d6d9a4fa4bc5273b5428c01bd_aie3w_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/blue_stars_ring_nucleus_of_galaxy_am_0644_741_poster-r857b427d6d9a4fa4bc5273b5428c01bd_aie3w_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/galaxy_ngc_3949_a_galaxy_similar_to_the_milky_way_poster-228609601219967760</guid><pubDate>Sat, 15 Jul 2006 23:27:55 GMT</pubDate><title><![CDATA[Galaxy NGC 3949: A Galaxy Similar to the Milky Way Poster]]></title><link>http://www.zazzle.com/galaxy_ngc_3949_a_galaxy_similar_to_the_milky_way_poster-228609601219967760</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$8.45</price><media:title><![CDATA[Galaxy NGC 3949: A Galaxy Similar to the Milky Way]]></media:title><media:description><![CDATA[Our Sun and solar system are embedded in a broad pancake of stars deep within the disk of the Milky Way galaxy. Even from a distance, it is impossible to see our galaxy&#39;s large-scale features other than the disk.

The next best thing is to look farther out into the universe at galaxies that are similar in shape and structure to our home galaxy. Other spiral galaxies like NGC 3949, pictured in the Hubble image, fit the bill. Like our Milky Way, this galaxy has a blue disk of young stars peppered with bright pink star-birth regions. In contrast to the blue disk, the bright central bulge is made up of mostly older, redder stars.

NGC 3949 lies about 50 million light-years from Earth. It is a member of a loose cluster of some six or seven dozens of galaxies located in the direction of the Big Dipper, in the constellation Ursa Major (the Great Bear). It is one of the larger galaxies of this cluster.

This image was created from Hubble data taken with the Wide Field Planetary Camera 2 in October 2001. Separate exposures through blue, visible, and near-infrared filters have been combined to make the natural color picture. This image was produced by the Hubble Heritage Team (STScI).]]></media:description><media:price>$8.45</media:price><media:thumbnail url="http://rlv.zcache.com/galaxy_ngc_3949_a_galaxy_similar_to_the_milky_way_poster-rcdfc9839c3c4474b806a4516fea66a9d_afg2_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/galaxy_ngc_3949_a_galaxy_similar_to_the_milky_way_poster-rcdfc9839c3c4474b806a4516fea66a9d_afg2_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_posters-228804305584671997</guid><pubDate>Sat, 15 Jul 2006 23:18:42 GMT</pubDate><title><![CDATA[Barred Spiral Galaxy NGC 1300 Posters]]></title><link>http://www.zazzle.com/barred_spiral_galaxy_ngc_1300_posters-228804305584671997</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$20.95</price><media:title><![CDATA[Barred Spiral Galaxy NGC 1300]]></media:title><media:description><![CDATA[One of the largest Hubble Space Telescope images ever made of a complete galaxy is being unveiled today at the American Astronomical Society meeting in San Diego, Calif.

The Hubble telescope captured a display of starlight, glowing gas, and silhouetted dark clouds of interstellar dust in this 4-foot-by-8-foot image of the barred spiral galaxy NGC 1300. NGC 1300 is considered to be prototypical of barred spiral galaxies. Barred spirals differ from normal spiral galaxies in that the arms of the galaxy do not spiral all the way into the center, but are connected to the two ends of a straight bar of stars containing the nucleus at its center.

At Hubble&#39;s resolution, a myriad of fine details, some of which have never before been seen, is seen throughout the galaxy&#39;s arms, disk, bulge, and nucleus. Blue and red supergiant stars, star clusters, and star-forming regions are well resolved across the spiral arms, and dust lanes trace out fine structures in the disk and bar. Numerous more distant galaxies are visible in the background, and are seen even through the densest regions of NGC 1300.

In the core of the larger spiral structure of NGC 1300, the nucleus shows its own extraordinary and distinct &quot;grand-design&quot; spiral structure that is about 3,300 light-years (1 kiloparsec) long. Only galaxies with large-scale bars appear to have these grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through the grand-design disk, where it can potentially fuel a central black hole. NGC 1300 is not known to have an active nucleus, however, indicating either that there is no black hole, or that it is not accreting matter.

The image was constructed from exposures taken in September 2004 by the Advanced Camera for Surveys onboard Hubble in four filters. Starlight and dust are seen in blue, visible, and infrared light. Bright star clusters are highlighted in red by their associated emission from glowing hydrogen gas. Due to the galaxy&#39;s large size, two adjacent pointings of the telescope were necessary to cover the extent of the spiral arms. The galaxy lies roughly 69 million light-years away (21 megaparsecs) in the direction of the constellation Eridanus.

]]></media:description><media:price>$20.95</media:price><media:thumbnail url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_posters-ra22fa8ed80a1471abaf210f53212c8d5_aimmy_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/barred_spiral_galaxy_ngc_1300_posters-ra22fa8ed80a1471abaf210f53212c8d5_aimmy_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, barred spiral galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/an_old_star_gives_up_the_ghost_posters-228461649383893978</guid><pubDate>Sat, 15 Jul 2006 01:25:08 GMT</pubDate><title><![CDATA[An Old Star Gives Up the Ghost Posters]]></title><link>http://www.zazzle.com/an_old_star_gives_up_the_ghost_posters-228461649383893978</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$10.60</price><media:title><![CDATA[An Old Star Gives Up the Ghost]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope has recently obtained images of the planetary nebula NGC 6369. This object is known to amateur astronomers as the &quot;Little Ghost Nebula,&quot; because it appears as a small, ghostly cloud surrounding the faint, dying central star. NGC 6369 lies in the direction of the constellation Ophiuchus, at a distance estimated to be between about 2,000 and 5,000 light-years from Earth.

When a star with a mass similar to that of our own Sun nears the end of its lifetime, it expands in size to become a red giant. The red-giant stage ends when the star expels its outer layers into space, producing a faintly glowing nebula. Astronomers call such an object a planetary nebula, because its round shape resembles that of a planet when viewed with a small telescope.

The Hubble photograph of NGC 6369, captured with the Wide Field Planetary Camera 2 (WFPC2) in February 2002, reveals remarkable details of the ejection process that are not visible from ground-based telescopes because of the blurring produced by the Earth&#39;s atmosphere.

The remnant stellar core in the center is now sending out a flood of ultraviolet (UV) light into the surrounding gas. The prominent blue-green ring, nearly a light-year in diameter, marks the location where the energetic UV light has stripped electrons off of atoms in the gas. This process is called ionization. In the redder gas at larger distances from the star, where the UV light is less intense, the ionization process is less advanced. Even farther outside the main body of the nebula, one can see fainter wisps of gas that were lost from the star at the beginning of the ejection process.

The color image has been produced by combining WFPC2 pictures taken through filters that isolate light emitted by three different chemical elements with different degrees of ionization. The doughnut-shaped blue-green ring represents light from ionized oxygen atoms that have lost two electrons (blue) and from hydrogen atoms that have lost their single electrons (green). Red marks emission from nitrogen atoms that have lost only one electron.

Our own Sun may eject a similar nebula, but not for another 5 billion years. The gas will expand away from the star at about 15 miles per second, dissipating into interstellar space after some 10,000 years. After that, the remnant stellar ember in the center will gradually cool off for billions of years as a tiny white dwarf star, and eventually wink out.]]></media:description><media:price>$10.60</media:price><media:thumbnail url="http://rlv.zcache.com/an_old_star_gives_up_the_ghost_posters-readd5b6db19345a2b28fae4f40ca9275_noe_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/an_old_star_gives_up_the_ghost_posters-readd5b6db19345a2b28fae4f40ca9275_noe_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope old, star ghost, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/close_up_of_m27_the_dumbbell_nebula_posters-228825987409030687</guid><pubDate>Sat, 15 Jul 2006 01:19:22 GMT</pubDate><title><![CDATA[Close-Up of M27, the Dumbbell Nebula Posters]]></title><link>http://www.zazzle.com/close_up_of_m27_the_dumbbell_nebula_posters-228825987409030687</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$8.40</price><media:title><![CDATA[Close-Up of M27, the Dumbbell Nebula]]></media:title><media:description><![CDATA[An aging star&#39;s last hurrah is creating a flurry of glowing knots of gas that appear to be streaking through space in this close-up image of the Dumbbell Nebula, taken with NASA&#39;s Hubble Space Telescope.

The Dumbbell, a nearby planetary nebula residing more than 1,200 light-years away, is the result of an old star that has shed its outer layers in a glowing display of color. The nebula, also known as Messier 27 (M27), was the first planetary nebula ever discovered. French astronomer Charles Messier spotted it in 1764.

The Hubble images of the Dumbbell show many knots, but their shapes vary. Some look like fingers pointing at the central star, located just off the upper left of the image; others are isolated clouds, with or without tails. Their sizes typically range from 11 - 35 billion miles (17 - 56 billion kilometers), which is several times larger than the distance from the Sun to Pluto. Each contains as much mass as three Earths.

The knots are forming at the interface between the hot (ionized) and cool (neutral) portion of the nebula. This area of temperature differentiation moves outward from the central star as the nebula evolves. In the Dumbbell astronomers are seeing the knots soon after this hot gas passed by.

Dense knots of gas and dust seem to be a natural part of the evolution of planetary nebulae. They form in the early stages, and their shape changes as the nebula expands. Similar knots have been discovered in other nearby planetary nebulae that are all part of the same evolutionary scheme. They can be seen in Hubble telescope photos of the Ring Nebula (NGC 6720), the Eskimo Nebula (NGC 2392) and the Retina Nebula (IC 4406). The detection of these knots in all the nearby planetaries imaged by the Hubble telescope allows astronomers to hypothesize that knots may be a feature common in all planetary nebulae.

This image, created by the Hubble Heritage Team (STScI), was taken by Hubble&#39;s Wide Field Planetary Camera 2 in November 2001, by Bob O&#39;Dell (Vanderbilt University) and collaborators. The filters used to create this color image show oxygen in blue, hydrogen in green and a combination of sulfur and nitrogen emission in red.]]></media:description><media:price>$8.40</media:price><media:thumbnail url="http://rlv.zcache.com/close_up_of_m27_the_dumbbell_nebula_posters-r1da61c68d5e64723a1fccb5974a3b5be_f2ux_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/close_up_of_m27_the_dumbbell_nebula_posters-r1da61c68d5e64723a1fccb5974a3b5be_f2ux_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope galaxy dumbbell, nebula, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/a_perfect_storm_of_turbulent_gases_in_the_omega_sw_poster-228009264183948867</guid><pubDate>Sat, 15 Jul 2006 01:10:16 GMT</pubDate><title><![CDATA[A Perfect Storm of Turbulent Gases in the Omega/Sw Poster]]></title><link>http://www.zazzle.com/a_perfect_storm_of_turbulent_gases_in_the_omega_sw_poster-228009264183948867</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$13.95</price><media:title><![CDATA[A Perfect Storm of Turbulent Gases in the Omega/Sw]]></media:title><media:description><![CDATA[Resembling the fury of a raging sea, this image actually shows a bubbly ocean of glowing hydrogen gas and small amounts of other elements such as oxygen and sulfur.

The photograph, taken by NASA&#39;s Hubble Space Telescope, captures a small region within M17, a hotbed of star formation. M17, also known as the Omega or Swan Nebula, is located about 5,500 light-years away in the constellation Sagittarius. The image is being released to commemorate the thirteenth anniversary of Hubble&#39;s launch on April 24, 1990.

The wave-like patterns of gas have been sculpted and illuminated by a torrent of ultraviolet radiation from young, massive stars, which lie outside the picture to the upper left. The glow of these patterns accentuates the three-dimensional structure of the gases. The ultraviolet radiation is carving and heating the surfaces of cold hydrogen gas clouds. The warmed surfaces glow orange and red in this photograph. The intense heat and pressure cause some material to stream away from those surfaces, creating the glowing veil of even hotter greenish gas that masks background structures. The pressure on the tips of the waves may trigger new star formation within them.

The image, roughly 3 light-years across, was taken May 29-30, 1999, with the Wide Field Planetary Camera 2. The colors in the image represent various gases. Red represents sulfur; green, hydrogen; and blue, oxygen.]]></media:description><media:price>$13.95</media:price><media:thumbnail url="http://rlv.zcache.com/a_perfect_storm_of_turbulent_gases_in_the_omega_sw_poster-rdc9cddf0670a4ff78e89fcba96de1175_2mv4_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/a_perfect_storm_of_turbulent_gases_in_the_omega_sw_poster-rdc9cddf0670a4ff78e89fcba96de1175_2mv4_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope galaxy perfect, storm, space posters, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/galaxy_ngc_1427a_plunges_toward_the_fornax_galaxy_poster-228671066771857144</guid><pubDate>Fri, 14 Jul 2006 21:25:46 GMT</pubDate><title><![CDATA[Galaxy NGC 1427A Plunges Toward the Fornax Galaxy  Posters]]></title><link>http://www.zazzle.com/galaxy_ngc_1427a_plunges_toward_the_fornax_galaxy_poster-228671066771857144</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.70</price><media:title><![CDATA[Galaxy NGC 1427A Plunges Toward the Fornax Galaxy ]]></media:title><media:description><![CDATA[What happens when a galaxy falls in with the wrong crowd? The irregular galaxy NGC 1427A is a spectacular example of the resulting stellar rumble. Under the gravitational grasp of a large gang of galaxies, called the Fornax cluster, the small bluish galaxy is plunging headlong into the group at 600 kilometers per second or nearly 400 miles per second.

NGC 1427A, which is located some 62 million light-years away from Earth in the direction of the constellation Fornax, shows numerous hot, blue stars in this newly released image obtained by the Hubble Space Telescope. These blue stars have been formed very recently, showing that star formation is occurring extensively throughout the galaxy.

Galaxy clusters, like the Fornax cluster, contain hundreds or even thousands of individual galaxies. Within the Fornax cluster, there is a considerable amount of gas lying between the galaxies. When the gas within NGC 1427A collides with the Fornax gas, it is compressed to the point that it starts to collapse under its own gravity. This leads to formation of the myriad of new stars seen across NGC 1427A, which give the galaxy an overall arrowhead shape that appears to point in the direction of the galaxy&#39;s high-velocity motion. The tidal forces of nearby galaxies in the cluster may also play a role in triggering star formation on such a massive scale.

NGC 1427A will not survive long as an identifiable galaxy passing through the cluster. Within the next billion years, it will be completely disrupted, spilling its stars and remaining gas into intergalactic space within the Fornax cluster.

To the upper left of NGC 1427A is a background galaxy that happens to lie near Hubble&#39;s line of sight but is some 25 times further away. In contrast to the irregularly shaped NGC 1427A, the background galaxy is a magnificent spiral, somewhat similar to our own Milky Way. Stars are forming in its symmetric pinwheel-shaped spiral arms, which can be traced into the galaxy&#39;s bright nucleus. This galaxy is, however, less dominated by very young stars than NGC 1427A, giving it an overall yellower color. At even greater distances background galaxies of various shapes and colors are scattered across the Hubble image.

The Hubble Space Telescope&#39;s Advanced Camera for Surveys was used to obtain images of NGC 1427A in visible (green), red, and infrared filters in January 2003. These images were then combined by the Hubble Heritage team to create the color rendition shown here. Astronomers are using the data to investigate the star-formation patterns throughout the object, to verify a prediction that there should be a relation between the ages of stars and their positions within the galaxy. This will help them understand how the gravitational influence of the cluster has affected the internal workings of this galaxy, and how this galaxy has responded to passing through the cluster environment.

The disruption of objects like NGC 1427A, and even larger galaxies like our own Milky Way, is an integral part of the formation and evolution of galaxy clusters. Such events are believed to have been very common during the early evolution of the universe, but the rate of galaxy destruction is tapering off at the present time. Thus the impending destruction of NGC 1427A provides a glimpse of an early and much more chaotic time in our universe.]]></media:description><media:price>$17.70</media:price><media:thumbnail url="http://rlv.zcache.com/galaxy_ngc_1427a_plunges_toward_the_fornax_galaxy_poster-r500826d9cf7e4be599f91691f0661094_afga_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/galaxy_ngc_1427a_plunges_toward_the_fornax_galaxy_poster-r500826d9cf7e4be599f91691f0661094_afga_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope galaxy, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_dusty_galaxy_ngc_1316_poster-228974706383446332</guid><pubDate>Fri, 14 Jul 2006 21:13:25 GMT</pubDate><title><![CDATA[The Dusty Galaxy NGC 1316 Poster]]></title><link>http://www.zazzle.com/the_dusty_galaxy_ngc_1316_poster-228974706383446332</link><author>alandail</author><description><![CDATA[



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Like dust bunnies that lurk in corners and under beds, surprisingly complex loops and blobs of cosmic dust lie hidden in the giant elliptical galaxy NGC 1316. This image made from data obtained with the NASA Hubble Space Telescope reveals the dust lanes and star clusters of this giant galaxy that give evidence that it was formed from a past merger of two gas-rich galaxies.

The combination of Hubble&#39;s superb spatial resolution and the sensitivity of the Advanced Camera for Surveys (ACS), installed onboard Hubble in 2002 and used for these images, enabled uniquely accurate measurements of a class of red star clusters in NGC 1316. Astronomers conclude that these star clusters constitute clear evidence of the occurrence of a major collision of two spiral galaxies that merged together a few billion years ago to shape NGC 1316 as it appears today.

NGC 1316 is on the outskirts of a nearby cluster of galaxies in the southern constellation of Fornax, at a distance of about 75 million light-years. It is one of the brightest ellipticals in the Fornax galaxy cluster. NGC 1316, also known as Fornax A, is one of the strongest and largest radio sources in the sky, with radio lobes extending over several degrees of sky (well off the Hubble image).

NGC 1316&#39;s violent history is evident in various ways. Wide-field imagery from Cerro Tololo Interamerican Observatory in Chile shows a bewildering variety of ripples, loops and plumes immersed in the galaxy&#39;s outer envelope. Amongst these so-called &quot;tidal&quot; features, the narrow ones are believed to be the stellar remains of other spiral galaxies that merged with NGC 1316 some time during the last few billion years. The inner regions of the galaxy shown in the Hubble image reveal a complicated system of dust lanes and patches. These are thought to be the remains of the interstellar medium associated with one or more of the spiral galaxies swallowed by NGC 1316.

The U.S. team of scientists, led by Dr. Paul Goudfrooij of the Space Telescope Science Institute in Baltimore, Maryland, used the ACS onboard Hubble to study star clusters in several nearby giant elliptical galaxies. Their study of NGC 1316 focused on globular clusters, which are compact stellar systems with hundreds of thousands to millions of stars formed at the same time.

The unprecedented sensitivity of the Hubble ACS data permitted the team to detect faint globular clusters previously impossible to reach. By counting the number of globular clusters detected as a function of their brightness they could, for the first time, see evidence of the gradual disruption of star clusters created during a past merger of gas-rich galaxies. They found that the relative number of low-mass clusters is significantly lower in the inner regions than in the outer regions, by an amount consistent with theoretical predictions.

These Hubble ACS images were taken in March 2003. The color composite is a combination of data taken in F435W (blue), F555W (yellow-green), and F814W (infrared) filters. The team&#39;s results have improved our understanding of how elliptical galaxies and their star clusters may have formed during galaxy mergers and then evolve to resemble &#39;normal&#39; elliptical galaxies after several billions of years.]]></media:description><media:price>$17.95</media:price><media:thumbnail url="http://rlv.zcache.com/the_dusty_galaxy_ngc_1316_poster-rdce63b84d7634a438b31a9b9356dc808_a67f2_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_dusty_galaxy_ngc_1316_poster-rdce63b84d7634a438b31a9b9356dc808_a67f2_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope dusty, galaxy, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubble_snaps_images_of_a_pinwheel_shaped_galaxy_poster-228361234130404897</guid><pubDate>Fri, 14 Jul 2006 21:03:09 GMT</pubDate><title><![CDATA[Hubble Snaps Images of a Pinwheel-Shaped Galaxy Posters]]></title><link>http://www.zazzle.com/hubble_snaps_images_of_a_pinwheel_shaped_galaxy_poster-228361234130404897</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$18.60</price><media:title><![CDATA[Hubble Snaps Images of a Pinwheel-Shaped Galaxy]]></media:title><media:description><![CDATA[Looking like a child&#39;s pinwheel ready to be set a spinning by a gentle breeze, this dramatic spiral galaxy is one of the latest viewed by NASA&#39;s Hubble Space Telescope. Stunning details of the face-on spiral galaxy, cataloged as NGC 1309, are captured in this color image.

Recent observations of the galaxy taken in visible and infrared light come together in a colorful depiction of many of the galaxy&#39;s features. Bright blue areas of star formation pepper the spiral arms, while ruddy dust lanes follow the spiral structure into a yellowish central nucleus of older-population stars. The image is complemented by myriad far-off background galaxies.

However, this galaxy image is more than just a pretty picture. It is helping astronomers to more accurately measure the expansion rate of the universe. NGC 1309 was home to supernova SN 2002fk, whose light reached Earth in September 2002. This supernova event, known as a Type Ia, resulted from a white dwarf star accreting matter from its companion in a binary star system. When the white dwarf collected enough mass and was no longer able to support itself, the star detonated, becoming the brightest object in the galaxy for several weeks.

Nearby Type Ia supernovae like SN 2002fk in NGC 1309 are used by astronomers to calibrate distance measures in the universe. By comparing nearby Type Ia supernovae to more distant ones, they can determine not only that the universe is expanding, but that this expansion is accelerating. However, this method only works if the distance to the host galaxies is known extremely well.

That&#39;s where the Hubble Telescope comes into play. Since NGC 1309 is relatively close to us, the high resolution of Hubble&#39;s Advanced Camera for Surveys can help accurately determine the distance to the galaxy by looking at the light output of a particular type of variable star called a Cepheid variable. Cepheids are well studied in our own galaxy, and vary regularly in brightness at a rate that is directly related to their total intrinsic brightness. By comparing their variation rate with how bright they appear, astronomers can deduce their distance. In this way, the Cepheids in NGC 1309 allow astronomers to accurately measure the distance to NGC 1309, and thus to SN 2002fk. The expansion of the universe was discovered by Edwin Hubble, the Hubble Space Telescope&#39;s namesake, nearly a century ago, but the accelerating expansion is a recent discovery which has interesting consequences for cosmological models.

These Hubble images were taken in August and September 2005. NGC 1309 resides 100 million light-years (30 Megaparsecs) from Earth. It is one of about 200 galaxies that make up the Eridanus group of galaxies.]]></media:description><media:price>$18.60</media:price><media:thumbnail url="http://rlv.zcache.com/hubble_snaps_images_of_a_pinwheel_shaped_galaxy_poster-re1d312d1589e43f69976f8cdaf0966fe_aibvq_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubble_snaps_images_of_a_pinwheel_shaped_galaxy_poster-re1d312d1589e43f69976f8cdaf0966fe_aibvq_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope pinwheel, galaxy, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/iridescent_glory_of_nearby_helix_nebula_posters-228479818595147266</guid><pubDate>Thu, 13 Jul 2006 21:38:30 GMT</pubDate><title><![CDATA[Iridescent Glory of Nearby Helix Nebula Posters]]></title><link>http://www.zazzle.com/iridescent_glory_of_nearby_helix_nebula_posters-228479818595147266</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.75</price><media:title><![CDATA[Iridescent Glory of Nearby Helix Nebula]]></media:title><media:description><![CDATA[In one of the largest and most detailed celestial images ever made, the coil-shaped Helix Nebula is being unveiled tomorrow in celebration of Astronomy Day (Saturday, May 10).

The composite picture is a seamless blend of ultra-sharp NASA Hubble Space Telescope (HST) images combined with the wide view of the Mosaic Camera on the National Science Foundation&#39;s 0.9-meter telescope at Kitt Peak National Observatory, part of the National Optical Astronomy Observatory, near Tucson, Ariz. Astronomers at the Space Telescope Science Institute assembled these images into a mosaic. The mosaic was then blended with a wider photograph taken by the Mosaic Camera. The image shows a fine web of filamentary &quot;bicycle-spoke&quot; features embedded in the colorful red and blue gas ring, which is one of the nearest planetary nebulae to Earth.

Because the nebula is nearby, it appears as nearly one-half the diameter of the full Moon. This required HST astronomers to take several exposures with the Advanced Camera for Surveys to capture most of the Helix. HST views were then blended with a wider photo taken by the Mosaic Camera. The portrait offers a dizzying look down what is actually a trillion-mile-long tunnel of glowing gases. The fluorescing tube is pointed nearly directly at Earth, so it looks more like a bubble than a cylinder. A forest of thousands of comet-like filaments, embedded along the inner rim of the nebula, points back toward the central star, which is a small, super-hot white dwarf.

The tentacles formed when a hot &quot;stellar wind&quot; of gas plowed into colder shells of dust and gas ejected previously by the doomed star. Ground-based telescopes have seen these comet-like filaments for decades, but never before in such detail. The filaments may actually lie in a disk encircling the hot star, like a collar. The radiant tie-die colors correspond to glowing oxygen (blue) and hydrogen and nitrogen (red).

Valuable Hubble observing time became available during the November 2002 Leonid meteor storm. To protect the spacecraft, including HST&#39;s precise mirror, controllers turned the aft end into the direction of the meteor stream for about half a day. Fortunately, the Helix Nebula was almost exactly in the opposite direction of the meteor stream, so Hubble used nine orbits to photograph the nebula while it waited out the storm. To capture the sprawling nebula, Hubble had to take nine separate snapshots.

Planetary nebulae like the Helix are sculpted late in a Sun-like star&#39;s life by a torrential gush of gases escaping from the dying star. They have nothing to do with planet formation, but got their name because they look like planetary disks when viewed through a small telescope. With higher magnification, the classic &quot;donut-hole&quot; in the middle of a planetary nebula can be resolved. Based on the nebula&#39;s distance of 650 light-years, its angular size corresponds to a huge ring with a diameter of nearly 3 light-years. That&#39;s approximately three-quarters of the distance between our Sun and the nearest star.

The Helix Nebula is a popular target of amateur astronomers and can be seen with binoculars as a ghostly, greenish cloud in the constellation Aquarius. Larger amateur telescopes can resolve the ring-shaped nebula, but only the largest ground-based telescopes can resolve the radial streaks. After careful analysis, astronomers concluded the nebula really isn&#39;t a bubble, but is a cylinder that happens to be pointed toward Earth.]]></media:description><media:price>$17.75</media:price><media:thumbnail url="http://rlv.zcache.com/iridescent_glory_of_nearby_helix_nebula_posters-r52b6c438a2544008964fcdc98f2ea0da_w2q_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/iridescent_glory_of_nearby_helix_nebula_posters-r52b6c438a2544008964fcdc98f2ea0da_w2q_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, nebula, helix nebula pencil]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_pencil_nebula_remnants_of_an_exploded_star_n_poster-228428418710863456</guid><pubDate>Thu, 13 Jul 2006 21:26:38 GMT</pubDate><title><![CDATA[The Pencil Nebula: Remnants of an Exploded Star (N Posters]]></title><link>http://www.zazzle.com/the_pencil_nebula_remnants_of_an_exploded_star_n_poster-228428418710863456</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/the_pencil_nebula_remnants_of_an_exploded_star_n_poster-228428418710863456" id="page_zWidget44-title" class="gbb-productTitle" title="The Pencil Nebula: Remnants of an Exploded Star (N Posters">The Pencil Nebula: Remnants of an Exploded Star (N Posters</a>
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</div>]]></description><price>$15.80</price><media:title><![CDATA[The Pencil Nebula: Remnants of an Exploded Star (N]]></media:title><media:description><![CDATA[Remnants from a star that exploded thousands of years ago created a celestial abstract portrait, as captured in this NASA Hubble Space Telescope image of the Pencil Nebula.

Officially known as NGC 2736, the Pencil Nebula is part of the huge Vela supernova remnant, located in the southern constellation Vela. Discovered by Sir John Herschel in the 1840s, the nebula&#39;s linear appearance triggered its popular name. The nebula&#39;s shape suggests that it is part of the supernova shock wave that recently encountered a region of dense gas. It is this interaction that causes the nebula to glow, appearing like a rippled sheet.

In this snapshot, astronomers are looking along the edge of the undulating sheet of gas. This view shows large, wispy filamentary structures, smaller bright knots of gas, and patches of diffuse gas. The Hubble Heritage Team used the Advanced Camera for Surveys in October 2002 to observe the nebula. The region of the Pencil Nebula captured in this image is about three fourths of a light-year across. The Vela supernova remnant is 114 light-years (35 parsecs) across. The remnant is about 815 light-years (250 parsecs) away from our solar system.

The nebula&#39;s luminous appearance comes from dense gas regions that have been struck by the supernova shock wave. As the shock wave travels through space [from right to left in the image], it rams into interstellar material. Initially the gas is heated to millions of degrees, but then subsequently cools down, emitting the optical light visible in the image.

The colors of the various regions in the nebula yield clues about this cooling process. Some regions are still so hot that the emission is dominated by ionized oxygen atoms, which glow blue in the picture. Other regions have cooled more and are seen emitting red in the image (cooler hydrogen atoms). In this situation, color shows the temperature of the gas. The nebula is visible in this image because it is glowing.

The supernova explosion left a spinning pulsar at the core of the Vela region. Based on the rate at which the pulsar is slowing down, astronomers estimate that the explosion may have occurred about 11,000 years ago. Although no historical records of the blast exist, the Vela supernova would have been 250 times brighter than Venus and would have been easily visible to southern observers in broad daylight. The age of the blast, if correct, would imply that the initial explosion pushed material from the star at nearly 22 million miles per hour. As the Vela supernova remnant expands, the speed of its moving filaments, such as the Pencil Nebula, decreases. The Pencil Nebula, for example, is moving at roughly 400,000 miles per hour.]]></media:description><media:price>$15.80</media:price><media:thumbnail url="http://rlv.zcache.com/the_pencil_nebula_remnants_of_an_exploded_star_n_poster-rb5b3c213e39e4e2c9f71ca139d33f98f_fsn9_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_pencil_nebula_remnants_of_an_exploded_star_n_poster-rb5b3c213e39e4e2c9f71ca139d33f98f_fsn9_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, nebula, helix nebula pencil]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/light_echo_illuminates_dust_around_supergiant_st_poster-228322862330776644</guid><pubDate>Thu, 13 Jul 2006 21:12:33 GMT</pubDate><title><![CDATA[&quot;Light Echo&quot; Illuminates Dust Around Supergiant St Poster]]></title><link>http://www.zazzle.com/light_echo_illuminates_dust_around_supergiant_st_poster-228322862330776644</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.25</price><media:title><![CDATA["Light Echo" Illuminates Dust Around Supergiant St]]></media:title><media:description><![CDATA[&quot;Starry Night,&quot; Vincent van Gogh&#39;s famous painting, is renowned for its bold whorls of light sweeping across a raging night sky. Although this image of the heavens came only from the artist&#39;s restless imagination, a new picture from NASA&#39;s Hubble Space Telescope bears remarkable similarities to the van Gogh work, complete with never-before-seen spirals of dust swirling across trillions of miles of interstellar space.

This image, obtained with the Advanced Camera for Surveys on February 8, 2004, is Hubble&#39;s latest view of an expanding halo of light around a distant star, named V838 Monocerotis (V838 Mon). The illumination of interstellar dust comes from the red supergiant star at the middle of the image, which gave off a flashbulb-like pulse of light two years ago. V838 Mon is located about 20,000 light-years away from Earth in the direction of the constellation Monoceros, placing the star at the outer edge of our Milky Way galaxy.

Called a light echo, the expanding illumination of a dusty cloud around the star has been revealing remarkable structures ever since the star suddenly brightened for several weeks in early 2002. Though Hubble has followed the light echo in several snapshots, this new image shows swirls or eddies in the dusty cloud for the first time. These eddies are probably caused by turbulence in the dust and gas around the star as they slowly expand away. The dust and gas were likely ejected from the star in a previous explosion, similar to the 2002 event, which occurred some tens of thousands of years ago. The surrounding dust remained invisible and unsuspected until suddenly illuminated by the brilliant explosion of the central star two years ago.

The Hubble telescope has imaged V838 Mon and its light echo several times since the star&#39;s outburst in January 2002, in order to follow the constantly changing appearance of the dust as the pulse of illumination continues to expand away from the star at the speed of light. During the outburst event, the normally faint star suddenly brightened, becoming 600,000 times more luminous than our Sun. It was thus one of the brightest stars in the entire Milky Way, until it faded away again in April 2002. The star has some similarities to a class of objects called &quot;novae,&quot; which suddenly increase in brightness due to thermonuclear explosions at their surfaces; however, the detailed behavior of V838 Mon, in particular its extremely red color, has been completely different from any previously known nova.

Nature&#39;s own piece of performance art, this structure will continue to change its appearance in coming years as the light from the stellar outburst continues to propagate outward and bounce off more distant black clouds of dust. Astronomers expect the echoes to remain visible for at least the rest of the current decade.]]></media:description><media:price>$17.25</media:price><media:thumbnail url="http://rlv.zcache.com/light_echo_illuminates_dust_around_supergiant_st_poster-r689e1fb7473a4d7aa0f47027f896f54f_jk2_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/light_echo_illuminates_dust_around_supergiant_st_poster-r689e1fb7473a4d7aa0f47027f896f54f_jk2_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_cats_eye_nebula_dying_star_creates_fantasy_l_poster-228324954951191552</guid><pubDate>Thu, 13 Jul 2006 21:03:29 GMT</pubDate><title><![CDATA[The Cat&#39;s Eye Nebula: Dying Star Creates Fantasy-l Print]]></title><link>http://www.zazzle.com/the_cats_eye_nebula_dying_star_creates_fantasy_l_poster-228324954951191552</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$10.45</price><media:title><![CDATA[The Cat's Eye Nebula: Dying Star Creates Fantasy-l]]></media:title><media:description><![CDATA[In this detailed view from NASA&#39;s Hubble Space Telescope, the so-called Cat&#39;s Eye Nebula]]></media:description><media:price>$10.45</media:price><media:thumbnail url="http://rlv.zcache.com/the_cats_eye_nebula_dying_star_creates_fantasy_l_poster-r8f88d9770cd84473b5ec2ba70d029199_f8lg_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_cats_eye_nebula_dying_star_creates_fantasy_l_poster-r8f88d9770cd84473b5ec2ba70d029199_f8lg_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, nebula, helix nebula]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/the_helix_nebula_a_gaseous_envelope_expelled_by_a_poster-228917058930116683</guid><pubDate>Thu, 13 Jul 2006 20:57:15 GMT</pubDate><title><![CDATA[The Helix Nebula: a Gaseous Envelope Expelled By a Posters]]></title><link>http://www.zazzle.com/the_helix_nebula_a_gaseous_envelope_expelled_by_a_poster-228917058930116683</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$18.65</price><media:title><![CDATA[The Helix Nebula: a Gaseous Envelope Expelled By a]]></media:title><media:description><![CDATA[This composite image is a view of the colorful Helix Nebula taken with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope and the Mosaic II Camera on the 4-meter telescope at Cerro Tololo Inter-American Observatory in Chile. The object is so large that both telescopes were needed to capture a complete view. The Helix is a planetary nebula, the glowing gaseous envelope expelled by a dying, sun-like star. The Helix resembles a simple doughnut as seen from Earth. But looks can be deceiving. New evidence suggests that the Helix consists of two gaseous disks nearly perpendicular to each other.

One possible scenario for the Helix&#39;s complex structure is that the dying star has a companion star. One disk may be perpendicular to the dying star&#39;s spin axis, while the other may lie in the orbital plane of the two stars. The Helix, located 690 light-years away, is one of the closest planetary nebulas to Earth.]]></media:description><media:price>$18.65</media:price><media:thumbnail url="http://rlv.zcache.com/the_helix_nebula_a_gaseous_envelope_expelled_by_a_poster-r156f874120b0443aab7f927ecb81b768_a68i0_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/the_helix_nebula_a_gaseous_envelope_expelled_by_a_poster-r156f874120b0443aab7f927ecb81b768_a68i0_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, nebula, helix nebula]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubbles_largest_galaxy_portrait_print-228117021493078016</guid><pubDate>Thu, 13 Jul 2006 18:50:22 GMT</pubDate><title><![CDATA[Hubble&#39;s Largest Galaxy Portrait  Print]]></title><link>http://www.zazzle.com/hubbles_largest_galaxy_portrait_print-228117021493078016</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$20.90</price><media:title><![CDATA[Hubble's Largest Galaxy Portrait ]]></media:title><media:description><![CDATA[Giant galaxies weren’t assembled in a day. Neither was this Hubble Space Telescope image of the face-on spiral galaxy Messier 101 (M101). It is the largest and most detailed photo of a spiral galaxy that has ever been released from Hubble. The galaxy’s portrait is actually composed of 51 individual exposures taken with Hubble&#39;s Advanced Camera for Surveys and the Wide Field and Planetary Camera 2 in March 1994, September 1994, June 1999, November 2002, and January 2003. The newly composed image also includes elements from images from ground-based photos.]]></media:description><media:price>$20.90</media:price><media:thumbnail url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_print-rddb5d9cc8d874e1f931048bb12a92cbd_aikw0_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubbles_largest_galaxy_portrait_print-rddb5d9cc8d874e1f931048bb12a92cbd_aikw0_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubble_sees_galaxy_on_edge_posters-228250839837678865</guid><pubDate>Thu, 13 Jul 2006 18:04:27 GMT</pubDate><title><![CDATA[Hubble Sees Galaxy on Edge  Posters]]></title><link>http://www.zazzle.com/hubble_sees_galaxy_on_edge_posters-228250839837678865</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$18.20</price><media:title><![CDATA[Hubble Sees Galaxy on Edge ]]></media:title><media:description><![CDATA[This is a unique view of the disk galaxy NGC 5866 tilted nearly edge-on to our line-of-sight. Hubble&#39;s sharp vision reveals a crisp dust lane dividing the galaxy into two halves. The image highlights the galaxy&#39;s structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo. NGC 5866 is a disk galaxy of type &quot;S0&quot; (pronounced s-zero). Viewed face on, it would look like a smooth, flat disk with little spiral structure. It remains in the spiral category because of the flatness of the main disk of stars as opposed to the more spherically rotund (or ellipsoidal) class of galaxies called &quot;ellipticals.&quot; Such S0 galaxies, with disks like spirals and large bulges like ellipticals, are called &#39;lenticular&#39; galaxies. NGC 5866 lies in the Northern constellation Draco, at a distance of 44 million light-years. It has a diameter of roughly 60,000 light-years only two-thirds the diameter of the Milky Way, although its mass is similar to our galaxy. This Hubble image of NGC 5866 is a combination of blue, green and red observations taken with the Advanced Camera for Surveys in February 2006.]]></media:description><media:price>$18.20</media:price><media:thumbnail url="http://rlv.zcache.com/hubble_sees_galaxy_on_edge_posters-r2c480e1d0a1e44ae8a196151af6b061e_aie0x_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubble_sees_galaxy_on_edge_posters-r2c480e1d0a1e44ae8a196151af6b061e_aie0x_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, hubble space telescope, galaxy]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/stellar_spire_in_the_eagle_nebula_poster-228447046622711631</guid><pubDate>Thu, 13 Jul 2006 07:09:45 GMT</pubDate><title><![CDATA[Stellar Spire in the Eagle Nebula Poster]]></title><link>http://www.zazzle.com/stellar_spire_in_the_eagle_nebula_poster-228447046622711631</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget50-preview" src="http://rlv.zcache.com/stellar_spire_in_the_eagle_nebula_poster-r7a06085fccf748f49f0ea26c26a2ee27_aiooa_8byvr_152.jpg" alt="Stellar Spire in the Eagle Nebula Poster" title="Stellar Spire in the Eagle Nebula Poster" class="dX-realviewImage" />
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				<span class="gbb-price">$22.75</span>
				
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				<a href="http://www.zazzle.com/stellar_spire_in_the_eagle_nebula_poster-228447046622711631" id="page_zWidget50-title" class="gbb-productTitle" title="Stellar Spire in the Eagle Nebula Poster">Stellar Spire in the Eagle Nebula Poster</a>
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</div>]]></description><price>$22.75</price><media:title><![CDATA[Stellar Spire in the Eagle Nebula]]></media:title><media:description><![CDATA[Stars in the Eagle Nebula are born in clouds of cold hydrogen gas that reside in chaotic neighborhoods, where energy from young stars sculpts fantasy-like landscapes in the gas. The tower may be a giant incubator for those newborn stars. A torrent of ultraviolet light from a band of massive, hot, young stars [off the top of the image] is eroding the pillar.]]></media:description><media:price>$22.75</media:price><media:thumbnail url="http://rlv.zcache.com/stellar_spire_in_the_eagle_nebula_poster-r7a06085fccf748f49f0ea26c26a2ee27_aiooa_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/stellar_spire_in_the_eagle_nebula_poster-r7a06085fccf748f49f0ea26c26a2ee27_aiooa_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, nebula, eagle nebula, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_poster-228413665601151517</guid><pubDate>Thu, 13 Jul 2006 06:50:44 GMT</pubDate><title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy Posters]]></title><link>http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_poster-228413665601151517</link><author>alandail</author><description><![CDATA[



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				<a href="http://www.zazzle.com/whirlpool_galaxy_m51_and_companion_galaxy_poster-228413665601151517" id="page_zWidget51-title" class="gbb-productTitle" title="Whirlpool Galaxy (M51) and Companion Galaxy Posters">Whirlpool Galaxy (M51) and Companion Galaxy Posters</a>
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</div>]]></description><price>$22.70</price><media:title><![CDATA[Whirlpool Galaxy (M51) and Companion Galaxy]]></media:title><media:description><![CDATA[This sharpest-ever image of the Whirlpool Galaxy, taken in January 2005 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope, illustrates a spiral galaxy&#39;s grand design, from its curving spiral arms, where young stars reside, to its yellowish central core, a home of older stars. The galaxy is nicknamed the Whirlpool because of its swirling structure.]]></media:description><media:price>$22.70</media:price><media:thumbnail url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_poster-ree72edea4a0f439eb30efb9c17a15df9_aio1p_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/whirlpool_galaxy_m51_and_companion_galaxy_poster-ree72edea4a0f439eb30efb9c17a15df9_aio1p_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, galaxy, whirlpool galaxy, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_poster-228543115506316548</guid><pubDate>Thu, 13 Jul 2006 06:07:25 GMT</pubDate><title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows Poster]]></title><link>http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_poster-228543115506316548</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget52-preview" src="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_poster-rc9020de0fe054cf9bdeed122a3921ed5_ai4em_8byvr_152.jpg" alt="Young Stars Sculpt Gas with Powerful Outflows Poster" title="Young Stars Sculpt Gas with Powerful Outflows Poster" class="dX-realviewImage" />
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				<a href="http://www.zazzle.com/young_stars_sculpt_gas_with_powerful_outflows_poster-228543115506316548" id="page_zWidget52-title" class="gbb-productTitle" title="Young Stars Sculpt Gas with Powerful Outflows Poster">Young Stars Sculpt Gas with Powerful Outflows Poster</a>
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</div>]]></description><price>$19.65</price><media:title><![CDATA[Young Stars Sculpt Gas with Powerful Outflows]]></media:title><media:description><![CDATA[This image of star cluster NGC 346 and its surrounding star-formation region was taken in July 2004 with the Advanced Camera for Surveys aboard NASA&#39;s Hubble Space Telescope. Located 210,000 light-years away in the Small Magellanic Cloud (SMC), a satellite galaxy of our Milky Way, the cluster is one of the most dynamic and intricately detailed star-forming regions in space. A dramatic structure of arched, ragged filaments with a distinct ridge encircles the cluster.]]></media:description><media:price>$19.65</media:price><media:thumbnail url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_poster-rc9020de0fe054cf9bdeed122a3921ed5_ai4em_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/young_stars_sculpt_gas_with_powerful_outflows_poster-rc9020de0fe054cf9bdeed122a3921ed5_ai4em_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, small magellanic cloud, ngc 346, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubble_catches_scattered_light_from_the_boomerang_poster-228974396607854442</guid><pubDate>Thu, 13 Jul 2006 05:57:52 GMT</pubDate><title><![CDATA[Hubble Catches Scattered Light from the Boomerang  Poster]]></title><link>http://www.zazzle.com/hubble_catches_scattered_light_from_the_boomerang_poster-228974396607854442</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget53-preview" src="http://rlv.zcache.com/hubble_catches_scattered_light_from_the_boomerang_poster-rdbf0b7c1ef064d4b9a85acd8f8200581_f8l1_8byvr_152.jpg" alt="Hubble Catches Scattered Light from the Boomerang  Poster" title="Hubble Catches Scattered Light from the Boomerang  Poster" class="dX-realviewImage" />
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				<span class="gbb-price">$10.35</span>
				
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				<a href="http://www.zazzle.com/hubble_catches_scattered_light_from_the_boomerang_poster-228974396607854442" id="page_zWidget53-title" class="gbb-productTitle" title="Hubble Catches Scattered Light from the Boomerang  Poster">Hubble Catches Scattered Light from the Boomerang  Poster</a>
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</div>]]></description><price>$10.35</price><media:title><![CDATA[Hubble Catches Scattered Light from the Boomerang ]]></media:title><media:description><![CDATA[NASA&#39;s Hubble Space Telescope caught the Boomerang Nebula in images taken with the Advanced Camera for Surveys in early 2005. This reflecting cloud of dust and gas has two nearly symmetric lobes of matter that are being ejected from a central star. Each lobe of the nebula is nearly one light-year in length, making the total length of the nebula half as long as the distance from our Sun to our nearest neighbors- the Alpha Centauri stellar system, located roughly 4 light-years away. The Boomerang Nebula resides 5,000 light-years from Earth. Hubble&#39;s sharp view is able to resolve patterns and ripples in the nebula very close to the central star that are not visible from the ground.]]></media:description><media:price>$10.35</media:price><media:thumbnail url="http://rlv.zcache.com/hubble_catches_scattered_light_from_the_boomerang_poster-rdbf0b7c1ef064d4b9a85acd8f8200581_f8l1_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubble_catches_scattered_light_from_the_boomerang_poster-rdbf0b7c1ef064d4b9a85acd8f8200581_f8l1_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, nebula, boomerang nebula, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-228950417384798878</guid><pubDate>Thu, 13 Jul 2006 05:47:52 GMT</pubDate><title><![CDATA[A Giant Hubble Mosaic of the Crab Nebula Posters]]></title><link>http://www.zazzle.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-228950417384798878</link><author>alandail</author><description><![CDATA[



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				<img id="page_zWidget54-preview" src="http://rlv.zcache.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-r4796fdddb62048d3942f9b0dc78a97c0_w2q_8byvr_152.jpg" alt="A Giant Hubble Mosaic of the Crab Nebula Posters" title="A Giant Hubble Mosaic of the Crab Nebula Posters" class="dX-realviewImage" />
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				<a href="http://www.zazzle.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-228950417384798878" id="page_zWidget54-title" class="gbb-productTitle" title="A Giant Hubble Mosaic of the Crab Nebula Posters">A Giant Hubble Mosaic of the Crab Nebula Posters</a>
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</div>]]></description><price>$17.75</price><media:title><![CDATA[A Giant Hubble Mosaic of the Crab Nebula]]></media:title><media:description><![CDATA[The Crab Nebula is a six-light-year-wide expanding remnant of a star&#39;s supernova explosion. Japanese and Chinese astronomers recorded this violent event nearly 1,000 years ago in 1054, as did, almost certainly, Native Americans. This composite image was assembled from 24 individual exposures taken with the NASA Hubble Space Telescope’s Wide Field and Planetary Camera 2 in October 1999, January 2000, and December 2000. It is one of the largest images taken by Hubble and is the highest resolution image ever made of the entire Crab Nebula.]]></media:description><media:price>$17.75</media:price><media:thumbnail url="http://rlv.zcache.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-r4796fdddb62048d3942f9b0dc78a97c0_w2q_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/a_giant_hubble_mosaic_of_the_crab_nebula_posters-r4796fdddb62048d3942f9b0dc78a97c0_w2q_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, nebula, crab nebula, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>

<item><guid isPermaLink="false">http://www.zazzle.com/hubble_panoramic_view_of_orion_nebula_poster-228365014705045755</guid><pubDate>Thu, 13 Jul 2006 05:12:50 GMT</pubDate><title><![CDATA[Hubble Panoramic View of Orion Nebula Poster]]></title><link>http://www.zazzle.com/hubble_panoramic_view_of_orion_nebula_poster-228365014705045755</link><author>alandail</author><description><![CDATA[



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</div>]]></description><price>$17.75</price><media:title><![CDATA[Hubble Panoramic View of Orion Nebula]]></media:title><media:description><![CDATA[In one of the most detailed astronomical images ever produced, NASA&#39;s Hubble Space Telescope captured an unprecedented look at the Orion Nebula. This turbulent star formation region is one of astronomy&#39;s most dramatic and photogenic celestial objects. More than 3,000 stars of various sizes appear in this image. Some of them have never been seen in visible light. These stars reside in a dramatic dust-and-gas landscape of plateaus, mountains, and valleys that are reminiscent of the Grand Canyon. The Orion Nebula is a picture book of star formation, from the massive, young stars that are shaping the nebula to the pillars of dense gas that may be the homes of budding stars.]]></media:description><media:price>$17.75</media:price><media:thumbnail url="http://rlv.zcache.com/hubble_panoramic_view_of_orion_nebula_poster-r9d3aaf282fa143bdbd58a5c174d4ee3a_w2q_8byvr_152.jpg" /><media:content url="http://rlv.zcache.com/hubble_panoramic_view_of_orion_nebula_poster-r9d3aaf282fa143bdbd58a5c174d4ee3a_w2q_8byvr_500.jpg" /><media:keywords><![CDATA[hubble, hubble telescope, orion, orion nebula, hubble space telescope]]></media:keywords><media:rating scheme="urn:mpaa">g</media:rating></item>
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