White hole

In astrophysics, a white hole is a postulated celestial body that spews out matter, in other words an anti-black hole, or the time reversal of a black hole.

Related Topics:
Astrophysics - Celestial body - Matter - Black hole - Time reversal

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White holes have long been speculated about in Science Fiction. They have been postulated as a means of transport between points of spacetime and even different universes. Due to a black hole's suggested funnel-like nature, matter travelling through a black hole and exiting through a white hole would be crushed to an immensely dense but small size, this would go against transportation because it is very unlikely that a white hole would have the ability to recompose the matter to its original state prior to entering the black hole. The existence of white holes is hypothetical, as they appear to violate the second law of thermodynamics.

Related Topics:
Spacetime - Second law of thermodynamics

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Other speculations include the hypothesis that quasars are actually white holes instead of supermassive black holes.

Related Topics:
Quasar - Supermassive black hole

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