In attempting to find the missing matter that seems to be required to explain observed properties of galaxies and clusters, astronomers have been able to rule out which populations?
A) black holes
B) hot and cold gas
C) weakly interacting massive particles
D) dead white dwarfs

Question

Quizplus · Accepted Answer

Astronomers have ruled out hot and cold gas as the missing matter because it does not account for the gravitational effects observed in galaxies and clusters. Other options like black holes, WIMPs, and dead white dwarfs are still considered potential candidates for dark matter.

In Attempting to Find the Missing Matter That Seems to Be