What If the Milky Way and Andromeda Galaxies Collided

See that bright object in the sky? That’s Andromeda – the closest major galaxy to our Milky Way and the most distant thing you can see with the naked eye. And… it’s racing toward us at a rate of 110 km per second (68 miles per second). Eventually, 4 billion years from now, Andromeda will merge our Milky Way in a huge galactic collision.