Question

How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)%0D%0AResponses%0D%0A%0D%0AThe two galaxies have collided previously.%0D%0AThe two galaxies have collided previously.%0D%0A%0D%0AThe Milky Way has changed course to head toward Andromeda.%0D%0AThe Milky Way has changed course to head toward Andromeda.%0D%0A%0D%0AAll galaxies will collide at some point.%0D%0AAll galaxies will collide at some point.%0D%0A%0D%0AAstronomers have observed their movements over time.

Answer 1

Astronomers know about the future collision of Andromeda and the Milky Way because **astronomers have observed their movements over time.** By studying the velocities and trajectories of these galaxies, they can predict their future interaction based on the gravitational forces at play and computer simulations of their movements.