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skippy1729

## Main Question or Discussion Point

Are there any exact solutions known for a black hole in a universe which is NOT asymptotically flat?

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- #1

skippy1729

Are there any exact solutions known for a black hole in a universe which is NOT asymptotically flat?

- #2

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However, there are some solutions, like Schwarzschild deSitter, which most people would say represent "a black hole in a non-AF universe".

- #3

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So you think radially rising light has some kind of apogee?An event horizon is defined as the boundary of the past of future null infinity, but there's no such thing as null infinity if the spacetime is not AF. (Intuitively, a black hole is a region of spacetime from which nothing can escape--but if there's no infinity, what does "escape" even mean?)

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