Timeline for Interstellar -- Black hole manipulation?
Current License: CC BY-SA 3.0
22 events
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| Apr 12, 2015 at 14:11 | history | edited | Praxis | CC BY-SA 3.0 |
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| Apr 11, 2015 at 3:50 | comment | added | Praxis | @VikramadityaMondal : Thanks, and sorry about the reference. There are many papers, including Roy Kerr's original 1963 paper (where he discovered the rotating solution to Einstein's equations) and the subsequent papers of Brandon Carter. But you might enjoy the book Geometry of Kerr Black Holes by Barrett O'Neal. It is quite comprehensive, and describes the interior in intricate detail. | |
| Apr 10, 2015 at 16:32 | comment | added | Hypnosifl | When you say "'timelike' and 'spacelike' are swapped" in the interior, isn't that just a peculiarity of Boyer-Lindquist coordinates rather than something with any coordinate-independent physical meaning? Similarly in Schwarzschild coordinates for a non-rotating black hole, the Schwarzschild "time" coordinate becomes spacelike inside the horizon and the "space" coordinate becomes timelike, but if you use some more natural system for the inner region like Kruskal-Szekeres coordinates there is no such change. | |
| Apr 10, 2015 at 15:11 | comment | added | VacuuM | @Praxis Okay now your answer looks good. I've upvoted it. But still you did not give me any reference of interior solution of such a black hole I asked for in the previous comment? Is there any such black hole? | |
| Apr 10, 2015 at 13:57 | comment | added | Praxis | @VikramadityaMondal : Made updates to answer. | |
| Apr 10, 2015 at 13:56 | comment | added | Praxis | @Hypnosifl : Made updates to answer. | |
| Apr 10, 2015 at 13:55 | history | edited | Praxis | CC BY-SA 3.0 |
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| Apr 10, 2015 at 12:56 | comment | added | Praxis | @Hypnosifl : That's fair, and a good point. My colleagues and I were basing hypotheses on interviews and other brief snippets regarding the science in the film. This makes me want to acquire and read this book! | |
| Apr 10, 2015 at 12:47 | comment | added | Hypnosifl | (cont) simulations will be "yes, they do occur." But I'm not completely certain.' In any case, even if he turns out to be wrong, this at least shows that the science consultant on the movie wasn't at the time imagining that Cooper was able to escape by taking advantage of a timelike ring singularity which could be avoided, but rather by being yanked out of our brane completely before reaching the center (whether or not this actually turns out to be a physically possible means of escaping a black hole). | |
| Apr 10, 2015 at 12:45 | comment | added | Hypnosifl | @Praxis - I was going by what Kip Thorne says about it (though I have seen the same claim elsewhere), in ch. 26 of "The Science of Interstellar" he says that it's thought a realistic black hole would have a BKL singularity at the center, though he does say 'we are not absolutely certain that the singularity inside a black hole's core is a BKL one ... more sophisticated simulations are needed to confirm that the BKL patterns of humongous stretch and squeeze do actually occur in the core of a black hole. I'm almost sure the result of those | |
| Apr 10, 2015 at 12:29 | comment | added | VacuuM | ...It will be helpful for me if you refer to a solution in which the interior of a black hole is something like free space allowing to float around. When the question is about a human being, I think saying anything about a sub-atomic particle is a misleading answer. I’m saying those because your answer is physics-based so never mind. | |
| Apr 10, 2015 at 12:29 | comment | added | VacuuM | I was also careful to use 'anyhow'. I understand that it is possible in science fiction. But I did not understand how your "physics-based answer" helps the plot, having Kerr black hole in stead of a Schwarzschild one. K. Throne's black hole in this movie has been severely modified from its real nature by Throne himself. But he admits the problem that this black hole will kill people by crushing in stead of spaghattification. That language was crude I agree, but the interior solutions for black holes as much I have seen indicates turbulence of mass-momentum-pressure (speaking roughly)... | |
| Apr 10, 2015 at 5:28 | comment | added | Praxis | ...Again, there are a lot of "Schwarzschild" stereotypes that are pervasive in science fiction. | |
| Apr 10, 2015 at 5:23 | comment | added | Praxis | @VikramadityaMondal : "...possible to go inside of a Kerr Black Hole for a human being safely?" No, I wouldn't make such a bold (and most likely false) assertion! That's why I was careful to say "particles, really", and specifically I was referring to subatomic matter. However, your statement about "collapsing of masses" is crude at best. Matter is collapsed during the formation of the black hole, of course. After formation, the properties of two different stable black holes arising from different Einstein metrics can be very different.... | |
| Apr 10, 2015 at 5:06 | comment | added | VacuuM | @Praxis The time for Cooper was slower than that of outside the black hole. Shouldn't Cooper be possibly crushed by the huge amount of gas and interstellar materials that have entered into the black hole over a long period of time (relatively)? Before getting into the tesseract inside the black hole the space-ship and Cooper was like floating in free space. Isn't a black hole means collapsing of masses? Do you mean anyhow that in theoretical physics it is possible to go inside of a Kerr Black Hole for a human being safely? | |
| Apr 10, 2015 at 4:44 | history | edited | Praxis | CC BY-SA 3.0 |
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| Apr 10, 2015 at 4:38 | comment | added | Praxis | ...in the strongly-coupled regime, and will have also made significant feats of engineering. It might be reasonable to conclude that the tesseract's creators could have the ability to artificially influence the extremality of his particular black hole. | |
| Apr 10, 2015 at 4:38 | comment | added | Praxis | @Hypnosifl : I'm not sure what your physics background is, but that's just one paper, out of several hundred on the subject. The authors make various assumptions on initial conditions in trying to construct a "realistic" model, assumptions that may or may not apply here. Also, I acknowledge that the tesseract is intended to be artificially created, but it could have been designed to exploit the Carter effect. In any case, whoever designed the tesseract will likely have resolved many obstacles to properly understanding AdS/CFT, gauge / gravity, and holography... | |
| Apr 10, 2015 at 4:24 | comment | added | Hypnosifl | But you are talking about an idealized eternal Kerr black hole, a realistic rotating black hole that formed from collapsing matter is not expected to have an avoidable timelike ring singularity but unavoidable spacelike and null singularities (see here). And the "The Science of Interstellar" made clear that the tesseract was meant to be a piece of advanced technology that could freely travel into the "bulk" (the higher spatial dimension), away from our "brane" (the familiar 3 dimensions of space and 1 of time) where the black hole resides. | |
| Apr 10, 2015 at 3:37 | history | edited | Praxis | CC BY-SA 3.0 |
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| Apr 10, 2015 at 3:32 | comment | added | Praxis | Also, I should add that general relativity is one of my main specialities, and for good measure, I consulted two other colleagues of mine in the physics department I work for before posting this. | |
| Apr 10, 2015 at 3:31 | history | answered | Praxis | CC BY-SA 3.0 |