Galaxy group | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-08

This is an audio version of the Wikipedia Article:
Galaxy group


00:00:32 1 Characteristics
00:01:44 2 Types
00:01:56 2.1 Compact Groups
00:02:54 2.2 Fossil Groups
00:04:03 2.3 Proto-Groups
00:04:28 3 List
00:04:37 4 See also



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SUMMARY
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A galaxy group or group of galaxies (GrG) is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way (about 1010 times the luminosity of the Sun); collections of galaxies larger than groups that are first-order clustering are called galaxy clusters. The groups and clusters of galaxies can themselves be clustered, into superclusters of galaxies.
The Milky Way galaxy is part of a group of galaxies called the Local Group.