File:CL0024+17opt.jpg
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原始文件 (3,838 × 3,928像素,文件大小:18.67 MB,MIME类型:image/jpeg)
描述CL0024+17opt.jpg |
This rich galaxy cluster, catalogued as CL0024+17, is allowing astronomers to probe the distribution of dark matter in space. The blue streaks near the center of the image are the smeared images of very distant galaxies that are not part of the cluster. The distant galaxies appear distorted because their light is being bent and magnified by the powerful gravity of CL0024+17, an effect called gravitational lensing. Dark matter cannot be seen because it does not shine or reflect light. Astronomers can only detect its influence by how its gravity affects light. By mapping the distorted light created by gravitational lensing, astronomers can trace how dark matter is distributed in the cluster. While mapping the dark matter, astronomers found a dark-matter ring near the cluster's center. The ring's discovery is among the strongest evidence that dark matter exists. The Hubble observations were taken in November 2004 by the Advanced Camera for Surveys. |
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作者 | NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) | ||||
授权 (二次使用本文件) |
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其他版本 |
註解 InfoField | 該圖片含有註解:在維基媒體共享資源上查看註解 |
one of several images
of same galaxy
one of several images
of same galaxy
one of several images
of same galaxy
one of several images
of same galaxy
likely one of several images
of same galaxy
15 5 2007
image/jpeg
19,573,302 字节
3,928 像素
3,838 像素
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当前 | 2009年7月19日 (日) 15:01 | 3,838 × 3,928(18.67 MB) | Tryphon | Original size. | |
2007年5月17日 (四) 02:10 | 1,251 × 1,280(1.97 MB) | Clh288~commonswiki | {{Information |Description=This rich galaxy cluster, catalogued as Cl 0024+17, is allowing astronomers to probe the distribution of dark matter in space. The blue streaks near the center of the image are the smeared images of very distant galaxies that ar |
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宽度 | 3,838 px |
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高度 | 3,928 px |
压缩方案 | LZW |
像素构成 | RGB |
方位 | 标准 |
像素数 | 3 |
水平分辨率 | 300 dpi |
垂直分辨率 | 300 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1日 (二) 12:16 |
色彩空间 | 无标定 |