A student makes a chart about galaxies and mentions that the universe consists of many galaxies such as the Andromeda galaxy and the Milky Way galaxy.

Question

Which statement is true about these two galaxies?

A. They are both moving away from each other.
B. The Milky Way is a spiral galaxy and the Andromeda galaxy is not
C. They both exert a strong gravitational pull on each other.
D. The Milky Way galaxy is larger than the Andromeda galaxy.

Answer 1

The correct statement about the Milky Way galaxy and the Andromeda galaxy is:

C. They both exert a strong gravitational pull on each other.

Andromeda and the Milky Way are actually on a collision course, and they are gravitationally influencing each other. Over the next several billion years, they are expected to merge.