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From: wls@astrovax.UUCP (William L. Sebok)
Newsgroups: net.physics
Subject: Re: Re: Big Bang Impossible
Message-ID: <516@astrovax.UUCP>
Date: Thu, 13-Dec-84 17:58:04 EST
Article-I.D.: astrovax.516
Posted: Thu Dec 13 17:58:04 1984
Date-Received: Fri, 14-Dec-84 07:23:44 EST
References: <394@petsd.UUCP>
Organization: Princeton Univ. Astrophysics
Lines: 19

>      This expanding, spherical universe is quite different
> from the Schwarzschild solution of the Einstein equations
> which is commonly known as a "black hole." One difference is
> that the black hole is a stationary or slowly changing
> configuration, whereas the expanding universe clearly is
> rapidly changing.

No.  In the black hole solutions it is a bit tricky what is meant by time
and space, especially since inside the horizon the roles and space are
reversed.  In the reference frame of one falling into a black hole the
black hole is a quite dynamic collapsing universe.

Time reversed black hole solutions exist, sometimes called "white holes".
The main problem with such a solution is that it is not known how one
could exist except if it existed from the beginning.  However this is not
a problem if the white hole is our whole universe.
-- 
Bill Sebok			Princeton University, Astrophysics
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