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Blue Stars Ring Nucleus of Galaxy AM 0644-741 Poster
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Paper Type: Value Poster Paper (Matte)

Your walls are a reflection of you. Give them some personality with your favourite quotes, abstract art or beautiful photography on posters printed by Zazzle! Choose from up to 5 unique paper types and several sizes to create art that’s a perfect representation of you.

  • 122 gsm, 0.19 mm thick poster paper
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About This Design
Blue Stars Ring Nucleus of Galaxy AM 0644-741 Poster
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's Hubble Space Telescope (HST). This image is being released to commemorate the 14th anniversary of Hubble'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, catalogued as AM 0644-741, is a member of the class of so-called "ring galaxies." 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 "intruder") plunges directly through the disc of another one (the "target"). 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's disc, causing them to rush outward, somewhat like ripples in a pond after a large rock has been thrown in. As the ring ploughs 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 colour. 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 colour image. The Space Telescope Science Institute (STScI) is operated by the Association of for Research in Astronomy, Inc. (AURA), for NASA, under contract with the Goddard Space Flight Centre, Greenbelt, MD. The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency (ESA).
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Artwork designed by
Hubble Images
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Blue Stars Ring Nucleus of Galaxy AM 0644-741 Poster

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Artwork designed by
Hubble Images
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hubble

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hubble telescope

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hubble space telescope

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galaxy

All Products: hubble, hubble telescope, hubble space telescope, galaxy

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Product ID: 228173515287300721
Created on 16/07/2006 00:36
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