Black Holes, Singularities, Confusion

In the thread A Big Bang Misconception cavediver brought up some interesting stuff (well, I found it interesting).Alas, it's off-topic, but I would still like it to be explained, and am hoping that cavediver or anyone else who knows this stuff (no creationist nonsense please) can explain it.For reference:

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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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All a man's knowledge comes from his experiences

bump for cavediver on blackholes

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All a man's knowledge comes from his experiences

may as well start with the basic physics (in layman terms if you can) of blackholes--I think I understand that chart you post with the 45 degree angles, but . . .yeah, a primer in this stuff is probably the best place to start.oh, I did want to explore the wormhole aspect thing--but it looks like the basics are needed first--so we'll get there, and possibly other places too.

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So in some very wierd way, Pytahgoras was right--the universe is made of numbersall joking aside, and I know holmes's questions are interesting, but could we perhaps steer this back to the blackholes? just a thought.

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my problem--I don't know the questions to ask, so either someone else will have to, or, you can just to installments every know and then.Perhaps after your first "intro to the layman" I'll have questions.It's sort of like asking a three year old to ask why 2 + 2 = 4, when they don't know what 2, +, =, or 4 is.

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