What behavior do galactic rotation curves exhibit to suggest the existence of dark matter?
A) Small velocities are seen at large distances from the galactic center.
B) Small velocities are seen at distances close to the galactic center.
C) Large velocities are seen at large distances from the galactic center.
D) Large velocities are seen at distances close to the galactic center.

Question

Quizplus · Accepted Answer

Galactic rotation curves show that stars at large distances from the galactic center move at unexpectedly high velocities, suggesting the presence of unseen mass, or dark matter, to account for the gravitational effects.

What Behavior Do Galactic Rotation Curves Exhibit to Suggest the Existence