File:CL0024+17opt.jpg
Original file (3,838 × 3,928 pixels, file size: 18.67 MB, MIME type: image/jpeg)
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DescriptionCL0024+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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Author | NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) | ||||
Permission (Reusing this file) |
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Annotations InfoField | This image is annotated: View the annotations at Commons |
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
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:01, 19 July 2009 | 3,838 × 3,928 (18.67 MB) | Tryphon (talk | contribs) | Original size. | |
02:10, 17 May 2007 | 1,251 × 1,280 (1.97 MB) | Clh288~commonswiki (talk | contribs) | {{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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Width | 3,838 px |
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Height | 3,928 px |
Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 12:16, 1 May 2007 |
Color space | Uncalibrated |