Scientists have confirmed: the Andromeda galaxy (M31) is on a collision course with our own Milky Way galaxy. When the centers of the two galaxies collide, or even shear past each other if it’s a near-miss, there’s going to be an awful lot of cosmic smacking around happening. Eventually the two galaxies will probably merge, turning two beautiful spirals into a huge elliptical blob. It’s hard to say what will happen in our corner of the action, about two-thirds of the way out from our galactic center. It’s possible that it’ll just be a mind-blowing light show. But I’m not counting on it.
This could happen in the next four billion years. We’ve still got time to pack. But we’re fools if we don’t get working on that star drive right now.
Here‘s an artist’s conception of what it might look like, mid-tango. See it bigger at Astronomy Picture of the Day. And see what the stages of the collision might look like here, where you can also read more about it.