Which of the following is NOT a way in which astronomers detect dark matter in clusters of galaxies?
A) By determining the amount of mass necessary to gravitationally collapse clouds of gas to form the number of stars present
B) By determining the amount of mass necessary to gravitationally hold onto the hot gas surrounding galaxy clusters
C) By determining the amount of mass necessary to gravitationally hold a cluster of galaxies together
D) By determining the amount of mass necessary to gravitationally lens images of distant objects

Question

Quizplus · Accepted Answer

Determining the amount of mass necessary to gravitationally collapse clouds of gas to form the number of stars present is not a way in which astronomers detect dark matter in clusters of galaxies. This is actually a method used to determine the amount of visible matter in a galaxy or cluster. The other options listed are all methods used to detect the presence of dark matter in galaxy clusters.

Which of the Following Is NOT a Way in Which