Black Holes, Singularities, Confusion

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cavediver writes:

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percy writes:

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And a spinning singularity is a possibility, too, I assume?

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Yes. We usually regard the singularity of the Kerr solution (it's a black hole) as the source of the ang mom. But the singularity itself is very weird: it's in the shape of a ring. However, if you pass through the ring, you end up somwhere different than if you just go round the outside! You have to go round twice to get back to where you started from

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kuresu writes:

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the ring-shaped singularity?
any relation to the blackhole type that could hypothetically be used for wormhole travel?

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mind explaining it a little further when you get some time?

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cavediver writes:

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kuresu writes:

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any relation to the blackhole type that could hypothetically be used for wormhole travel?

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OT here. If you or someone wants to start a thread on a black hole q&a then I probably won't be able to resist putting some time in.

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But for now: yes it is related but not because of the ring nature of the singularity, but becasue of the dual "charges" of the black hole: "mass" and ang. mom. - yes, I know I said the Kerr solution has zero mass, but this is a different "mass"

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