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Galaxy Cluster A2199
<< Yesterday 22.01.1997 Tomorrow >>
Galaxy Cluster A2199
Credit & Copyright: 1.2-m Telescope, Whipple Obs., Harvard CfA
Explanation: It's bigger than a bread box. In fact, it's much bigger than all bread boxes put together. Abell 2199 is huge. In fact, it is a close, large cluster of galaxies, containing several thousands of galaxies centered around a central dominant galaxy. "Close," however, is only relative to other clusters of galaxies, since light takes about 50 million years to reach us from A2199. All of the fuzzy objects in the above picture are galaxies, but these galaxies do not contain most of the matter in the cluster. By studying clusters like A2199, astronomers conclude that some form of dark matter dominates the motion of the bright galaxies. What, exactly, this dark matter is poses one of the greatest astronomical puzzles of modern times.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Russkii tekst
Based on Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: galaxy cluster - Skoplenie galaktik - temnaya materiya
Publikacii so slovami: galaxy cluster - Skoplenie galaktik - temnaya materiya
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