How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)

Question

Responses

The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.

Astronomers have observed their movements over time.
Astronomers have observed their movements over time.

All galaxies will collide at some point.
All galaxies will collide at some point.

The two galaxies have collided previously.

Answer 1

Astronomers know about the future collision of Andromeda and the Milky Way because astronomers have observed their movements over time. By tracking the positions and velocities of both galaxies through telescopes and space missions, scientists can predict the course of their future interactions.