I believe the current theory is that most (all?) galaxies have a supermassive bl... | Hacker News

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		Merad on March 14, 2018 \| parent \| context \| favorite \| on: All disk galaxies rotate once every billion years:... I believe the current theory is that most (all?) galaxies have a supermassive black hole at their heart.

_lhlo on March 14, 2018 [–]

Yeah, or so I heard. What's the cause and effect order for galaxies and their corresponding supermassive black holes?

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