Dark matter in clusters of galaxies
A) does not appear to exist.
B) is distributed uniformly throughout the volume of the cluster.
C) is distributed mostly in and around the galaxies in the cluster and not in the voids between galaxies.
D) is distributed mostly in the voids between galaxies and not within the galaxies themselves.

Question

Quizplus · Accepted Answer

Observations of gravitational lensing and galaxy motions within clusters suggest that the majority of the dark matter is distributed around galaxies rather than uniformly within the cluster or in voids between galaxies. This is known as the "galaxy bias" of dark matter.

Dark Matter in Clusters of Galaxies