How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)
Responses
The two galaxies have collided previously.
The two galaxies have collided previously.
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 Milky Way has changed course to head toward Andromeda.
1 answer
The correct response is: Astronomers have observed their movements over time.
Astronomers use data from observations to track the motions of galaxies, and simulations help predict future interactions, which indicate that the Milky Way and Andromeda are on a collision course.
