Based on galactic rotation curves and cluster dynamics, we think dark matter:
A)is a minor component of the entire mass of the universe.
B)is best detected from the X-rays it produces in the intergalactic medium.
C)will have no effect on the fate of the universe.
D)comprises over 90% of the entire mass of the universe.
E)will doom the universe to collapse, overcoming the redshifts we now observe.

Question

Quizplus · Accepted Answer

Based on current observations and calculations, it is believed that dark matter comprises over 90% of the total mass of the universe. This is inferred from the gravitational effects it has on visible matter, such as the rotation curves of galaxies and the dynamics of galaxy clusters. X-rays from the intergalactic medium are not the most effective way to detect dark matter, and it is not believed to have a significant effect on the fate of the universe. While its eventual impact on the universe is still being studied, it is not predicted to cause the collapse of the universe. Based on galactic rotation curves and cluster dynamics, it is believed that dark matter comprises over 90% of the entire mass of the universe.

Based on Galactic Rotation Curves and Cluster Dynamics, We Think