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Galaxy group
Aggregation of galaxies with 50 or fewer members / From Wikipedia, the free encyclopedia
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A galaxy group[2] or group of galaxies[3] (GrG[4]) 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.[5] The groups and clusters of galaxies can themselves be clustered, into superclusters of galaxies.
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The Milky Way galaxy is part of a group of galaxies called the Local Group.[6]