File:Cartwheel-galaxy.jpg
Cartwheel-galaxy.jpg (641 × 523 pixels, file size: 498 KB, MIME type: image/jpeg)
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DescriptionCartwheel-galaxy.jpg |
A rare and spectacular head-on collision between two galaxies appears in this NASA Hubble Space Telescope true-color image of the Cartwheel Galaxy, located 500 million light-years away in the constellation Sculptor. The new details of star birth resolved by Hubble provide an opportunity to study how extremely massive stars are born in large fragmented gas clouds. The striking ring-like feature is a direct result of a smaller intruder galaxy — possibly one of two objects to the right of the ring — that careened through the core of the host galaxy. Like a rock tossed into a lake, the collision sent a ripple of energy into space, plowing gas and dust in front of it. Expanding at 200,000 miles per hour, this cosmic tsunami leaves in its wake a firestorm of new star creation. Hubble resolves bright blue knots that are gigantic clusters of newborn stars and immense loops and bubbles blown into space by exploding stars (supernovae) going off like a string of firecrackers. The Cartwheel Galaxy presumably was a normal spiral galaxy like our Milky Way before the collision. This spiral structure is beginning to re-emerge, as seen in the faint arms or spokes between the outer ring and bulls-eye shaped nucleus. The ring contains at least several billion new stars that would not normally have been created in such a short time span and is so large (150,000 light-years across) our entire Milky Way Galaxy would fit inside. |
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Source | http://hubblesite.org/newscenter/archive/releases/2007/17/image/d/ (direct link) | ||||
Author | NASA, ESA, and K. Borne (STScI) | ||||
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:27, 10 March 2010 | ![]() | 641 × 523 (498 KB) | Tryphon (talk | contribs) | Original size, from http://hubblesite.org/newscenter/archive/releases/2007/17/image/d/ (http://imgsrc.hubblesite.org/hu/db/images/hs-2007-17-d-full_jpg.jpg). |
09:10, 1 March 2006 | ![]() | 497 × 381 (28 KB) | Centaurus~commonswiki (talk | contribs) |
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Image title | CREATOR: XV Version 3.00b Rev: 6/15/94
CREATOR: XV Version 3.00b Rev: 6/15/94 Ghostscript 24 bit color image dump |
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Width | 641 px |
Height | 523 px |
Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 10:07, 11 May 2007 |
Color space | Uncalibrated |