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What is a hypothetical white hole?

a different name for quasar

an opposite to quasar

a different name for black hole

an opposite to black hole

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 and from which matter and light cannot escape. According to some researchers, the Bing Bang could be an example of such phenomenon.

Piotr Kotuła

3

ESA/Hubble & NASA wikipedia → White hole

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