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?
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3$\begingroup$ The Big Bang is pretty much it. $\endgroup$– AndrewFeb 29, 2012 at 23:34
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$\begingroup$ @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. $\endgroup$– user4552Jul 12, 2013 at 18:20
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2 Answers
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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.
answered Mar 11, 2012 at 23:15
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White hole is possible under General Relativity but violates the second law of thermodynamics. It is thus impossible.
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$\begingroup$ @TMS White hole is a black hole, reversed in time. $\endgroup$– AnixxDec 4, 2012 at 14:47
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1$\begingroup$ Sorry but that doesn't make the answer on violation obvious for me. $\endgroup$– TMSDec 4, 2012 at 17:03
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$\begingroup$ What may be easier to convince oneself of is that it can't form by gravitational collapse (since nothing can fall in). $\endgroup$– user4552Jul 12, 2013 at 18:21
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