Timeline for Can A Black Hole Exist?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| Apr 20, 2020 at 21:10 | comment | added | Timothy | deleted my answer. | |
| Apr 20, 2020 at 21:09 | comment | added | Timothy | present of where the apparent horizon is. It can't. You're just assuming that the time of being really close to the apparent horizon actually is in the near future rather than in the distant future. Maybe by the time you get that close to the apparent horizon, enough real actual time will have gone by to determine that that position in space at that time is outside the apparent horizon. I guess I thought you were jut simply assuming that since an outside observer never observes you reach the apparent horizon, you also see the end of the universe when you reach the apparent horizon. I | |
| Apr 20, 2020 at 21:04 | comment | added | Timothy | I finally realize that this is a real question. Although general relativity predicts that an outside observer will never observe the infaller reach the event horizon, it does not however predict that the infaller will observe the end of the universe before they reach the event horizon. According to general relativity, in one coordinate system, space if flowing towards the inside of the black hole. It's also possible that the laws really actually delay the timing of getting closer to the event horizon to times closer and closer to infinity. You may be thinking, how can the future affect the | |
| Jan 31, 2020 at 15:31 | answer | added | usernumber | timeline score: 4 | |
| Dec 30, 2018 at 22:45 | comment | added | user25329 | Related question: astronomy.stackexchange.com/questions/28945/… | |
| Sep 8, 2018 at 6:00 | history | tweeted | twitter.com/StackAstronomy/status/1038305936610406401 | ||
| Jul 11, 2015 at 20:49 | comment | added | Anixx | You may be interested to see this answer: physics.stackexchange.com/questions/21319/… | |
| Dec 27, 2014 at 13:37 | comment | added | Johannes | "However, what happens when an infalling observer passes the event horizon, the result is a mathematical absurdity, in that the observer would observe the universe outside the event horizon as beyond "the end of time."" -- this is incorrect. Whether beyond the event horizon or not, the infalling observer would observe photons coming from the universe outside the event horizon. | |
| Dec 23, 2014 at 11:01 | comment | added | ProfRob | I have addressed the point you make about observational evidence for event horizons. If you really want to to ask theoretical questions about black holes, you should separate them off and ask your question on Physics SE (if you want a much wider audience of potential responders). | |
| Dec 23, 2014 at 10:55 | answer | added | ProfRob | timeline score: 14 | |
| Dec 23, 2014 at 9:17 | comment | added | Stan Liou | Yes, in GTR it can. Related, possibly duplicate: Would time go by infinitely fast when crossing the event horizon of a black hole? You're making similar erroneous assumptions here about "the end of time." | |
| Dec 23, 2014 at 8:23 | review | First posts | |||
| Dec 23, 2014 at 15:53 | |||||
| Dec 23, 2014 at 8:21 | history | asked | Robert Mashlan | CC BY-SA 3.0 |