A hypothetical celestial object which expands outwards from a space–time singularity and emits energy, in the manner of a time-reversed black hole.
〔天文〕白洞
Example sentencesExamples
Even though both black holes and white holes are plausible scenarios according to general relativity, there is still a crucial difference.
A white hole emits lots of light photons.
It is still true that a black hole may in some way explode as a white hole, but we have no idea if it can, if it will, and if so, at what point this would happen.
And just as Humphreys' model has the universe expanding out of a white hole (a black hole running in reverse) so too does their paper!
The problem is with the amount of entropy in a white hole.
Definition of white hole in US English:
white hole
noun
Astronomy
A hypothetical celestial object that expands outward from a space-time singularity and emits energy, in the manner of a time-reversed black hole.
〔天文〕白洞
Example sentencesExamples
And just as Humphreys' model has the universe expanding out of a white hole (a black hole running in reverse) so too does their paper!
A white hole emits lots of light photons.
Even though both black holes and white holes are plausible scenarios according to general relativity, there is still a crucial difference.
It is still true that a black hole may in some way explode as a white hole, but we have no idea if it can, if it will, and if so, at what point this would happen.
The problem is with the amount of entropy in a white hole.