File:Cartwheel-galaxy.jpg
Cartwheel-galaxy.jpg (641 × 523像素,文件大小:498 KB,MIME类型:image/jpeg)
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描述Cartwheel-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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来源 | http://hubblesite.org/newscenter/archive/releases/2007/17/image/d/ (direct link) | ||||
作者 | NASA, ESA, and K. Borne (STScI) | ||||
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当前 | 2010年3月10日 (三) 01:27 | 641 × 523(498 KB) | Tryphon(留言 | 贡献) | 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). | |
2006年3月1日 (三) 09:10 | 497 × 381(28 KB) | Centaurus~commonswiki(留言 | 贡献) |
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图像标题 | 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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宽度 | 641 px |
高度 | 523 px |
压缩方案 | 未压缩 |
像素构成 | RGB |
方位 | 标准 |
像素数 | 3 |
水平分辨率 | 72 dpi |
垂直分辨率 | 72 dpi |
数据排列 | chunky format |
使用软件 | Adobe Photoshop CS2 Macintosh |
文件修改日期时间 | 2007年5月11日 (五) 10:07 |
色彩空间 | 无标定 |