Timeline for Shouldn't black holes exert the same gravitational force as an object of similar mass but lower density?
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| Feb 3, 2023 at 22:36 | comment | added | safesphere | Nice answer +1. Nothing major to fix, but if you are curious, check this out. When we observe a neutron star collapsing to a black hole, it starts as a spherical object with a very high stress-energy. After the collapse, all the star matter is spread thin over the horizon and the result appears the same as a vacuum black hole with a zero stress-energy. Meanwhile the total energy (and therefore mass) remains the same (if we neglect any radiation or emission). So (1) stress energy can be large or zero for the same total energy; (2) stress-energy is not what curves spacetime around a black hole. | |
| Feb 3, 2023 at 21:31 | history | edited | Árpád Szendrei | CC BY-SA 4.0 |
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| Feb 3, 2023 at 20:30 | history | answered | Árpád Szendrei | CC BY-SA 4.0 |