Re:What if Planet 9 is a Primordial Black Hole? (2019)
by 7373737373 on Friday August 13, 2021 @08:46PM
(#28176683)
Does anyone know how fast one would fall in from a 100km initial distance?
This answer: https://physics.stackexchange.com/a/332510/236187 seems to suggest that it takes mere milliseconds once one is within three times the Schwarzschild radius of the black hole. And that dozens of radii outward, one already moves at a significant fraction of the speed of light.
This answer: https://physics.stackexchange.com/a/332510/236187 seems to suggest that it takes mere milliseconds once one is within three times the Schwarzschild radius of the black hole. And that dozens of radii outward, one already moves at a significant fraction of the speed of light.