Re: OT: Disturbing thoughts on creation of the universe

In article <Lg+xIKDUmUIB@xxxxxxxxxxxxxxxxxxxxxxxx>, koehler@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (Bob Koehler) writes:
In article <4869bdfc$0$30363$c3e8da3@xxxxxxxxxxxxxxxxx>, JF Mezei <jfmezei.spamnot@xxxxxxxxxxxxx> writes:
This is VERY OT. But so strange I can't resist posting it.


And the matter/energy would essentilly be like a perpetual machine where
all of it is recycled when moved back in time to the big bang. The
matter/energy would merely exist in time, having never been created.

OK, now you can get a little close to reality. There have been
discussions of the end of the universe comming as a big squeeze,
which might be followed by a new big bang. But that was when the
known value of Hubble's constant allowed the possibility of a big
squeeze. There's a reason the Large Space Telescope was renamed the
Hubble Space Telescope, and one of it's most important results is
an established value of Hubble's constant which rules out a big
squeeze.

Yes the results which show the expansion of the Universe speeding up seem to
mean that it is unlikely that the Universe will collapse. However since we are
still uncertain about what dark energy is and its long term behaviour it is not
totally impossible that it might become an attractive force at some point in
the far far future.
However I seem to recall that some mathematical studies of possible cyclic
universes (before the discovery of dark energy) pointed out some problems with
the theory which meant such loops wouldn't be stable either leading to
universes which would expand forever or universes which would be smaller and
smaller each time. I think it was something to do with entropy - unfortunately
I can't recall the details.


David Webb
Security team leader
CCSS
Middlesex University




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