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Noun Concept
Categories: Galaxy clusters
EN
galaxy group  Compact galaxy group  Compact group of galaxies  Fossil cluster  Fossil galaxy cluster
EN
A galaxy group or group of galaxies is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way ; collections of galaxies larger than groups that are first-order clustering are called galaxy clusters. Wikipedia
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EN
A galaxy group or group of galaxies is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way ; collections of galaxies larger than groups that are first-order clustering are called galaxy clusters. Wikipedia
Structure made up of a gravitationally-bound aggregation of about 50 or fewer galaxies; is smaller than a galaxy cluster Wikidata
A group of galaxies that hold together gravitationally. Wiktionary