What happens when two galaxies collide? What would happen and what are the chances that our galaxy will collide with another?
In: Physics
There’s a 100% chance that our galaxy is in fact going to *merge* (collide isn’t necessarily the correct term) with the Andromeda galaxy in a few billion years.
As for what happens when galaxies merge? Not a whole lot, actually. Galaxies are mostly empty space, so there’s almost no chance that anything will actually collide. Some stars might be ejected from the new galaxy, but mostly, the 2 galaxies will just merge to form one larger galaxy, and any life that might exist in that galaxy at that time won’t notice anything except the slow change in the night sky over millions of years.
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