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