Charles 3781 Posted October 12, 2020 Share Posted October 12, 2020 30 minutes ago, MigL said: As Joigus says, the gravity produced by a BH is no different than from any other equivalent mass. If expansion can overcome the gravity of galaxy clusters, it can similarly overcome the gravity of a BH composed of the masses of the equivalent number of stars in that galaxy cluster. There is no upper limit on BH size. There is only a limit to how much you can feed them. Once they 'eat' all close by mass via their accretion disc, they can't overcome farther out stable orbiting material, and stop growing. Direct collapse, however,without going through star lifetimes, is a totally different mechanism. I'd like, if I may, to pick up on one issue.. MigL citing a previous post from Joigus, makes this statement: "The gravity produced by a BH is no different from any other equivalent mass". Now, I wonder whether this takes into account, the Black Hole's extremely small physical dimensions. Wouldn't these small dimensions cause a drastic reduction in the BH's ability to exert gravity. Following the diminishing inverse-square law from its outer surface? Link to comment Share on other sites More sharing options...
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