After growing increasingly distant, two galactic siblings—the Milky Way and Andromeda—will reunite (billions of years from now).
When you look up into the night sky you can see hundreds of stars without even using a telescope. How did all of these stars form?
What is better than Barney? Really? Learn about the Big Bang on this Moment of Science.
Scientists explain the inevitable collision by speculating that the Milky Way and Andromeda galaxies are a bound pair, meaning that they are in orbit around each other.