Astronomers know about the future collision of Andromeda and the Milky Way because astronomers have observed their movements over time. Through the study of the velocities and trajectories of these galaxies, they can predict that they are on a collision course, expected to occur in about 4.5 billion years.
How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)
Responses
All galaxies will collide at some point.
All galaxies will collide at some point.
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.
The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.
1 answer
1 answer