Re: wormholes
michael k teehan (miketeehan@worldnet.att.net)
Sun, 7 Dec 1997 18:09:58 -0500
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> From: michael k teehan <miketeehan@worldnet.att.net>
> To: extropians@extropy.com
> Subject: Re: wormholes
> Date: Sunday, December 07, 1997 7:48 AM
>
>
>
> ----------
> > From: Anders Sandberg <asa@nada.kth.se>
> > To: extropians@extropy.com
> > Subject: Re: wormholes
> > Date: Sunday, December 07, 1997 12:00 PM
> >
> > Keith Elis <hagbard@ix.netcom.com> writes:
> >
> > > But how can we tell if a mathematical point is rotating or not?
> >
> > As Lee Daniel Crocker pointed out, black holes are not points. They
> > are a pattern of spacetime, and rotates in all physically reasonable
> > models. A simple way of testing if a black hole rotates (and how fast)
> > is to drop a small object from towards it. If the object begins to
> > deviate from a straight fall, then the hole rotates and the deviation
> > and direction of deviation can be used to calculate the angular
> > momentum.
> >
> > I think there are some popular explanations of this in Pickover's
> > _Black Holes: A Travellers Guide_. There is also (of course) a more
> > detailled treatment in Misner, Thorne, Wheeler's _Gravity_.
> >
> > --
> > -----------------------------------------------------------------------
> > Anders Sandberg Towards Ascension!
> > asa@nada.kth.se http://www.nada.kth.se/~asa/
> > GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y