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This black hole is not spherically symmetric. The black hole has angular momentum (it is spinning) and it is surrounded by a disc of matter that is orbiting it. This disc is in a particular plane, around the equator of the black hole. The distortion of space time allows us to see the disc on the back of the black hole (if there was no distortion, that part ...


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Let me add an addendum to PM 2Ring's excellent answer. Why does the New Scientist article (apparently) say that a low-mass primordial black hole is "a million times denser than the moon"? It's because it's not really referring to actual black holes, but rather to the fake black hole used in a simulation. From reading the Yalinowich & Caplan (...


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The smaller a 'regular', stellar-mass black hole is, the denser it is inside of its event horizon, correct? Yes, that's correct. But the black hole density is a mean density, that is, it's just the mass of the BH divided by its Schwarzschild volume. It's not like there's a uniform ball of stuff inside the event horizon with that density. I have also read ...


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