Which of the following patterns in the Milky Way structure is consistent with the idea that the Milky Way has not suffered a major collision with another massive galaxy?
A)The disk is composed of stars orbiting in the same plane, same direction.
B)Globular clusters are compact groups of thousands of stars.
C)The disk is composed of stars of many different ages.
D)The halo is full of old stars orbiting in many different directions.

Question

Quizplus · Accepted Answer

If the Milky Way had suffered a major collision with another massive galaxy, it is likely that the stars in the disk would be orbiting in different planes and directions due to the gravitational disturbances caused by the collision. The fact that the stars in the disk are orbiting in the same plane and direction suggests that the Milky Way has not suffered a major collision with another massive galaxy.

Which of the Following Patterns in the Milky Way Structure