Timeline for Does the radio (between two co-moving astronauts) stop working when crossing the event horizon?
Current License: CC BY-SA 4.0
21 events
| when toggle format | what | by | license | comment | |
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| Sep 27 at 7:31 | history | edited | Qmechanic♦ |
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| Sep 27 at 7:25 | answer | added | Camion | timeline score: 1 | |
| Jul 17, 2022 at 16:57 | history | edited | Urb | CC BY-SA 4.0 |
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| May 6, 2021 at 16:07 | vote | accept | Árpád Szendrei | ||
| Jul 21, 2020 at 21:42 | answer | added | Ross Presser | timeline score: 2 | |
| Jul 19, 2020 at 17:53 | comment | added | safesphere | In a star collapse, both inside and outside, the coordinate time $t$ Is timelike for all values of $t$ trough infinity. This means that $t$ inside is never spacelike, so the inner spacetime is never Schwarzschild (in which $t$ is spacelike). This is the deep meaning of the fact that the Schwarzschild solution is eternal. The inner spacetime is either Schwarzschild forever or not Schwarzschild forever. It cannot be both. See this question (not the answers) for details: math.stackexchange.com/questions/3513195 | |
| Jul 19, 2020 at 15:59 | comment | added | Árpád Szendrei | @safesphere " the inner Schwarzschild spacetime does not exist in reality. It is eternal and cannot be created by a star collapse." Can you please elaborate on this one? | |
| Jul 19, 2020 at 6:20 | comment | added | safesphere | Simon's animations are misleading due to a poor choice of coordinates. They show the singularity as an object in space while instead it is a moment in time that does not exist anywhere in space. There is no inward and outward directions inside a black hole. They instead refer to the future and past. So radio waves go $360^o$ in all directions, but none of these directions point toward or away from the singularity. Please also note that the inner Schwarzschild spacetime does not exist in reality. It is eternal and cannot be created by a star collapse. | |
| Jul 13, 2020 at 13:51 | answer | added | R.W. Bird | timeline score: 0 | |
| Jul 13, 2020 at 6:00 | history | tweeted | twitter.com/StackPhysics/status/1282555371320737792 | ||
| Jul 12, 2020 at 21:53 | answer | added | stuffu | timeline score: 0 | |
| Jul 12, 2020 at 6:05 | history | became hot network question | |||
| Jul 12, 2020 at 3:25 | answer | added | stuffu | timeline score: 0 | |
| Jul 11, 2020 at 23:37 | answer | added | Aleph12345 | timeline score: 3 | |
| Jul 11, 2020 at 23:19 | history | edited | Dale | CC BY-SA 4.0 |
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| Jul 11, 2020 at 23:18 | answer | added | Dale | timeline score: 9 | |
| Jul 11, 2020 at 21:42 | comment | added | Árpád Szendrei | @stuffu tangential. | |
| Jul 11, 2020 at 20:21 | comment | added | stuffu | Is there radial distance between astronauts, or tangential? | |
| Jul 11, 2020 at 18:41 | history | edited | Árpád Szendrei | CC BY-SA 4.0 |
added 149 characters in body
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| Jul 11, 2020 at 18:31 | answer | added | Yukterez | timeline score: 23 | |
| Jul 11, 2020 at 15:58 | history | asked | Árpád Szendrei | CC BY-SA 4.0 |