How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point) Responses 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. The two galaxies have collided previously. The two galaxies have collided previously. All galaxies will collide at some point.

Astronomers know about the future collision of Andromeda and the Milky Way because they have observed their movements over time.

Astronomers know about the future collision of Andromeda and the Milky Way because they have observed their movements over time.

Astronomers know about the future collision of Andromeda and the Milky Way through observations of their movements over time. By studying the positions and motions of these galaxies, astronomers can track their paths and predict the eventual collision. This is possible due to the advancement of technology and the ability to measure the subtle changes in the positions and velocities of celestial objects. Through meticulous observations and calculations, astronomers have determined that the Milky Way has changed its course and is now heading towards Andromeda. Additionally, the knowledge of previous collisions between galaxies and the understanding that all galaxies will eventually collide provide further supporting evidence for this future collision. So, to summarize, astronomers rely on careful observations of the movements of Andromeda and the Milky Way to predict their future collision.