5
$\begingroup$

We went to a planetarium last night last night and watched "Black Holes" narrated by Liam Neeson. If I recall correctly, he said that scientists believe that they have identified a number of Black Holes, and that they think there are White Holes at the bottom of Black Holes and instead of drawing matter/light in, the White Holes spew matter out. I didn't get to ask this question after the session was over: Have scientists been able to find an example of a possible White Hole?

$\endgroup$
  • 3
    $\begingroup$ The Big Bang is pretty much it. $\endgroup$ – Andrew Feb 29 '12 at 23:34
  • $\begingroup$ @Andrew: No, the Big Bang was not a white hole. One way to see this is that an FLRW spacetime is homogeneous, whereas a Schwarzschild spacetime has only rotational symmetry. $\endgroup$ – Ben Crowell Jul 12 '13 at 18:20
5
$\begingroup$

No.

It's only a fictional object that agrees with einstein's formulas. But there is no evidence that that objects exists or had existed.

$\endgroup$
0
$\begingroup$

White hole is possible under General Relativity but violates the second law of thermodynamics. It is thus impossible.

$\endgroup$
  • 2
    $\begingroup$ Any reference for that violation? $\endgroup$ – TMS Dec 4 '12 at 13:35
  • $\begingroup$ @TMS White hole is a black hole, reversed in time. $\endgroup$ – Anixx Dec 4 '12 at 14:47
  • 1
    $\begingroup$ Sorry but that doesn't make the answer on violation obvious for me. $\endgroup$ – TMS Dec 4 '12 at 17:03
  • $\begingroup$ What may be easier to convince oneself of is that it can't form by gravitational collapse (since nothing can fall in). $\endgroup$ – Ben Crowell Jul 12 '13 at 18:21
  • $\begingroup$ Does it really violate the second law? $\endgroup$ – tox123 Aug 4 '17 at 22:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy