The rotation curve method is the most precise method for measuring the mass of a disk galaxy.

Question

Quizplus · Accepted Answer

The rotation curve method, which involves measuring the velocity of objects orbiting the galaxy at different distances from its center, is indeed considered one of the most precise methods for determining the mass distribution within disk galaxies. This method reveals the presence of dark matter by showing that the outer parts of galaxies rotate faster than would be expected based solely on the visible matter.

The Rotation Curve Method Is the Most Precise Method for Measuring