What large-scale structures result from smaller galaxy groups being drawn together over billions of years through gravitational dominance?
Answer
Galaxy clusters
The process of galaxy aggregation is a long-term evolutionary path dictated by gravity. Smaller collections of galaxies, or groups, are continually drawn toward one another by their collective gravitational pull. Over spans of billions of years, this relentless accretion and merging process builds up the largest known gravitationally bound structures observed in the cosmos, which are classified as galaxy clusters. These clusters represent the successful completion of early gravitational collapses before the accelerating expansion separated the intervening space too much.
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What Force Binds A Galaxy Together? - Physics Frontier - YouTube
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