Scientists Estimate the Following Quantities for the Coma Cluster: the Total

Multiple Choice

Scientists estimate the following quantities for the Coma Cluster: the total mass of the cluster is M_total ~ 1.3 *10¹⁵ M_SUN, the total mass of all stars is M_stars ~ 3 *10¹³ M_SUN, and the mass of the hot X-ray-emitting gas is M_gas ~ 1 * 10¹⁴ M_SUN.What is the corresponding percentage of dark matter within the Coma Cluster?

A) 4 percent
B) 25 percent
C) 72 percent
D) 90 percent
E) There is no dark matter contribution.