Image:CL0024+17opt.jpg
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| This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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| 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 are not part of the cluster. The distant galaxies appear distorted because their light is being bent and magnified by the powerful gravity of Cl 0024+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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| Source |
http://hubblesite.org/newscenter/archive/releases/2007/17/image/b/ |
| Date |
May 15, 2007 |
| Author |
NASA/ESA/HST |
| Permission (Reusing this image) |
Original work of NASA - public domain |
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This file is in the public domain because it was created by NASA and the European Space Agency. Hubble material is copyright-free and may be freely used as in the public domain without fee, on the condition that NASA and ESA is credited as the source of the material. The material was created for NASA by STScI under Contract NAS5-26555 and for ESA by the Hubble European Space Agency Information Centre. [1] or [2]. |
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File history
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 02:10, 17 May 2007 | 1,251×1,280 (1.97 MB) | Clh288 | ({{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 | 3838 |
|---|---|
| Height | 3928 |
| Compression scheme | 5 |
| 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 | 12:17, 1 May 2007 |
| Color space | 65535 |
