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 Milky Way has changed course to head toward Andromeda.
All galaxies will collide at some point.
All galaxies will collide at some point.
Astronomers have observed their movements over time.
Astronomers have observed their movements over time.
The two galaxies have collided previously.
1 answer
Astronomers have observed their movements over time.