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From Wikipedia, the free encyclopedia
For other uses, see White hole (disambiguation).
In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it. In this sense, it is the reverse of a black hole, which can only be entered from the outside, from which nothing, including light, can escape. White holes appear in the theory of eternal black holes. In addition to a black hole region in the future, such a solution of the Einstein field equations has a white hole region in its past.[1] However, this region does not exist for black holes that have formed through gravitational collapse, nor are there any known physical processes through which a white hole could be formed.
hmmm ...Then doesn’t an explosion fit the definition of a white hole..or least a form of... but also would trying to go backward in time be a form of white hole... energy and matter come out forward in time but nothing can go backwards to that same point