Which of the following would not be considered evidence for dark matter in clusters of galaxies?

Question

Quizplus · Accepted Answer

The total amount of stars in a cluster of galaxies is not necessarily indicative of the presence of dark matter. Dark matter is believed to interact primarily through gravity, and therefore its presence is inferred through its gravitational effects on other objects in the cluster, such as the velocities of galaxies and the curvature of spacetime. The temperature of intergalactic gas is also related to dark matter, as simulations suggest that gas is heated by dark matter halos during cluster formation. Gravitational lensing observations are also a powerful tool for probing the presence of dark matter.

Which of the Following Would Not Be Considered Evidence for Dark