: : : Since a black hole is formed by the collapse of a star, how how would a white hole be formed (if white holes even exist)?

: : : A good question - I have no answer, except to say that a white hole counterpart to a black hole, being of extreme density similar to a black hole, woudl require speed greater than light (and therefore impossible levels of energy) to exist, and therefore would probably return to a black hole state. The only real "white hole" that one could imagine is the Big Bang, in which a tear in the virtual fabric underlying space-time allows vast amounts of quantum energy and matter to explode and inflate simultaneously from a single point, creating space and time as it goes...wow.

: An interesting point to remember is that a white hole is simply a mathematical prediction of a physical phenomenon. What I mean by this is that if you run time backwards in Einstein’s relativity equations (which is a perfectly legitimate thing to do), they predict white holes. Physically, this would be tremendously difficult (probably impossible), since creating a white hole is the mathematical equivalent to destroying a black hole.

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