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Most galaxies just fly around at varying speeds, but sometimes they collide, and when that happens, it means that all of the stars and planets within one galaxy clash with the others. The explosion and aftereffects that ensue, are, well, astronomic. Most of the planets and stars would crash into each other and become big balls of hot gas and magma, and some of them would combine, some of them would fly around and be shot into space due to the massive amounts of opposing gravity amassing. As for the cores of the galaxies, the Super Massive Black Holes, they would suck up anything that they could find, and eventually crash into each other. I actually don't know what would happen when Super Massive Black Holes collide, but I'm sure you can use your imagination for that. ;)

*Most of this stuff is theoretical, because us humans haven't been out there to see and experience it for ourselves.

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14y ago

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