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. All galaxies will collide at some point. All galaxies will collide at some point. The Milky Way has changed course to head toward Andromeda. The Milky Way has changed course to head toward Andromeda. Astronomers have observed their movements over time
Astronomers have observed their movements over time.
All galaxies will collide at some point.
Astronomers have observed their movements over time.
The correct answer is: Astronomers have observed their movements over time.
Astronomers have been studying the movement and positions of galaxies for many years. By carefully observing the motion of Andromeda and the Milky Way, they have been able to track their paths and predict that they will collide in the future. This prediction is based on the law of gravity, which states that objects with mass attract each other. By measuring the velocities and trajectories of these galaxies, astronomers can calculate their future paths and predict that they will eventually collide.