How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)
Responses
The Milky Way has changed course to head toward Andromeda.
The two galaxies have collided previously.
Astronomers have observed their movements over time.
All galaxies will collide at some point.
1 answer
Astronomers know about the future collision of Andromeda and the Milky Way because they have observed their movements over time.