Astronomers know about the future collision of Andromeda and the Milky Way primarily because astronomers have observed their movements over time. By tracking the velocities and trajectories of these galaxies, they have been able to predict that they will eventually collide in approximately 4.5 billion years.
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