"Galaxy groups" refers to a collection of galaxies that are close together and interact with one another. It is a smaller scale than galaxy clusters but bigger than individual galaxies.
Sentences with «galaxy groups»
Small galaxy groups are about 1000 times more common than large clusters, so there should be many more Bullet - like groups. (newscientist.com)
The difficulty of studying the movements of dwarf satellites around their hosts varies according to the target galaxy group. (sciencedaily.com)
This is a list of galaxy groups within 100 million light years according to P Fouqué and co-workers. (atlasoftheuniverse.com)