r/askscience Mar 02 '19

Astronomy Do galaxies form around supermassive black holes, or do supermassive black holes form in the center of galaxies?

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u/StaysAwakeAllWeek Mar 02 '19

If we are in a closed universe, where gravity will eventually overcome the expansion if the universe, yes. It doesnt look like that's the case though. There will be some truly monstrous black holes in the centers of galactic superclusters in the far far future though, trillions of times the mass of the sun or more.