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White hole

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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.

Although white holes appear to solve the energy conservation problem, their existence is still very speculative, as they appear to violate the second law of thermodynamics.

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

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