Groups and clusters of galaxies

Galaxy groups and clusters are super-structures in the spread of galaxies of the cosmos. Matter throughout the visible universe has, over the course of the universe's history, aggregated into a range of large-scale structures under the influence of gravity. Groups and clusters may contain from ten to thousands of galaxies. The clusters themselves are involved in larger groups called superclusters.

Related Topics:
Super-structures - Gravity - Supercluster

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