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May 20, 2019 at 6:29 comment added safesphere Also a Schwarzschild black hole doesn't have a point-like center. The spacetime geometry inside the horizon is an infinitely long 3-cylinder with a rapidly shrinking circumference. While space in the universe is expanding, space inside a black hole is contracting at a very fast rate (just microseconds for a stellar size black hole).
May 20, 2019 at 5:59 comment added safesphere The idea of a black hole being a shell just outside the horizon is well known. However your personal theory of the shell being inside the horizon has nothing to do with physics, but is based on a lack of knowledge or understanding of the Schwarzschild metric. Time inside a black hole doesn't move slower relative to the universe. Instead, time inside a black hole moves in a different direction and for this reason can't be put in any reference at all to the time elsewhere in the universe, not "slower", not "faster", nothing. You can't race to the destination while moving in different directions.
May 18, 2019 at 20:35 comment added p6majo The time slows down outside of the event horizon. Inside the black hole, the role of the radial coordinate and the time coordinate changes if the Schwarzschild metric is extrapolated into the black hole. It's not obvious for me that it further slows down, does it?
May 18, 2019 at 20:29 answer added Moonraker timeline score: 3
May 18, 2019 at 18:21 answer added Physics timeline score: 0
May 18, 2019 at 18:16 answer added Árpád Szendrei timeline score: 0
May 18, 2019 at 17:46 history edited DoctorBill CC BY-SA 4.0
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May 18, 2019 at 17:37 history asked DoctorBill CC BY-SA 4.0