Which of these statements about galaxy clusters is true?
A) Galaxy clusters do not require dark matter in order to form.
B) Galaxy clusters are the largest structures in the universe.
C) Small galaxy clusters form first, then merge together to form larger galaxy clusters.
D) Galaxy clusters are evenly distributed throughout the universe.
E) There are such large distances between galaxy clusters that they never actually run into each other.

Question

Quizplus · Accepted Answer

Small galaxy clusters, or groups, form first and then merge to create larger clusters, a process consistent with the hierarchical model of structure formation in the universe.

Which of These Statements About Galaxy Clusters Is True