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 and then merge 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 form first and then merge to form larger galaxy clusters, a process known as hierarchical clustering, which is supported by observations and simulations of the universe's structure formation.

Which of These Statements About Galaxy Clusters Is True