It is now believed the majority of mass for most galaxies lies in their dark halos.

Question

Quizplus · Accepted Answer

Studies on the rotation curve of stars in galaxies suggest that the majority of mass is located in the dark matter halo rather than the visible matter such as stars, gas and dust. Recent studies and observations have shown evidence that the majority of the mass in galaxies, including our own Milky Way, is contained within the dark matter halos surrounding the visible components of the galaxies. Therefore, it is believed that the answer is A, true.

It Is Now Believed the Majority of Mass for Most