What evidence suggests that most of the mass of the Milky Way is in the form of dark matter?
A)Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk.
B)Although dark matter emits no visible light, we have detected its radio emissions.
C)The orbital speeds of stars far from the galactic center are surprisingly high.
D)Our view of distant galaxies is often obscured by dark blotches, which are presumably made of dark matter.

Question

Quizplus · Accepted Answer

The orbital speeds of stars far from the galactic center are surprisingly high, indicating the presence of a large amount of unseen mass, which we believe is dark matter. This evidence is often referred to as the "missing mass problem" in galactic dynamics. Options A and D are incorrect as they do not directly relate to the evidence for dark matter in the Milky Way. Option B is also incorrect as dark matter does not emit radiowaves.

What Evidence Suggests That Most of the Mass of the Milky