A Galactic Collision Course

The Andromeda Galaxy is roughly 2.5 million light years away

from the Milky Way. But that won't always be the case,

because both are on a collision course that will ultimately

alter the structure of each galaxy forever.The galaxies

are rushing closer to one another at about 70 miles

per second, which is 112 kilometers per second, and it is

estimated that the collision will begin in around

4.5 billion years from now. While this collision