When Galaxies Collide

What will happen 3 to 5 billion years from now, when our galaxy will likely merge with the Andromeda galaxy? The (soundless) video above will give you a quick preview. This footage from the Hubble Space Telescope offers multiple views of recent galaxy collisions. It's worth noting that when galaxies "collide," they don't literally hit one another. Rather they pull on one another, as the New Scientist explains. And the gravitational force is enough to do some serious violence -- the kind captured in the footage above.

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