A ___________ generally contains well over 1000 galaxies and is quite dense. They often contain many giant elliptical galaxies.
A)local group
B)poor cluster
C)rich cluster
D)tidal tail
E)quasar

Question

Quizplus · Accepted Answer

Rich clusters are known to contain well over 1000 galaxies and are quite dense compared to poor clusters. They are the largest known gravitationally bound structures in the universe and often contain many giant elliptical galaxies.

A ___________ Generally Contains Well Over 1000 Galaxies and Is