Which of the following generally contain well over 1000 galaxies (mainly ellipticals)packed closely together?
A)local groups
B)poor clusters
C)rich clusters
D)tidal tails

Question

Quizplus · Accepted Answer

Rich clusters are known to contain well over 1000 galaxies, mainly ellipticals, packed closely together. Local groups are small collections of a few dozen galaxies that include the Milky Way, whereas poor clusters contain fewer than 1000 galaxies. Tidal tails are elongated streams of stars, gas, and dust that are stretched out by gravitational interactions between galaxies.

Which of the Following Generally Contain Well Over 1000 Galaxies