How do stars in the disk of the Milky Way move?

Question

Quizplus · Accepted Answer

Stars in the disk of the Milky Way generally move on circular orbits in the same direction. This is because the disk of the Milky Way is a rotating system, and the stars within it are orbiting around the center of mass of the galaxy. The rotation of the disk is dominated by the gravitational attraction of the massive central bulge, and the stars in the disk move in the same direction as the rotation of the bulge. Although there may be some deviations from perfectly circular orbits due to interactions with other stars or other effects, the overall motion of stars in the disk is generally along circular orbits in the same direction.

How Do Stars in the Disk of the Milky Way