Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

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?

share|cite|improve this question
The Big Bang is pretty much it. – Andrew Feb 29 '12 at 23:34
@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. – Ben Crowell Jul 12 '13 at 18:20


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

share|cite|improve this answer

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

share|cite|improve this answer
Any reference for that violation? – TMS Dec 4 '12 at 13:35
@TMS White hole is a black hole, reversed in time. – Anixx Dec 4 '12 at 14:47
Sorry but that doesn't make the answer on violation obvious for me. – TMS Dec 4 '12 at 17:03
What may be easier to convince oneself of is that it can't form by gravitational collapse (since nothing can fall in). – Ben Crowell Jul 12 '13 at 18:21

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.