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From: hitlong@yahoo.com (gharnagel)
Newsgroups: sci.physics.relativity
Subject: Re: Space and spacetime
Date: Mon, 24 Jun 2024 22:43:08 +0000
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Maciej Wozniak lied, blustered, insulted and slandered:
>
> [lies, bluster, insults and slanders deleted]

Being a mathematically-challenged non compos mentis who
is a congenital liar in complete denial of reality, his
opinions are totally worthless.

So let's deal with the topic of this thread: space and
spacetime.  I find the basic concept of string theory
very compelling: that is, elementary particles are not
points as the standard model posits.  In the real world
there is no such thing as a dimensionless point.  It's
a very good assumption because the string theory particles
are way smaller than we can detect, but presuming
elementary particles have extension in space is surely
correct, even though strings may not be.

Some of the things that string theory leads to, however,
are very interesting, such as M-theory and branes.  The
ekpyrotic theory is one that sets forth a reason why the
big bang happened:

https://en.wikipedia.org/wiki/Ekpyrotic_universe

although I disagree with a cyclic universe as presented.
Anyway, that's not necessarily a given in the theory.
The universe may still be cyclic without a contraction
(in agreement with the present information that the
expansion is accelerating.  The energy for a bang comes
from the bashing of an adjacent brain into ours, as
proposed in the original theory and, if it happened once,
why couldn't it happen again?  And again, and again, and
again?

This would shoot down the idea that spacetime (and space)
only extends as far as the last bang (the one nearest and
dearest to our hearts) has had time to expand.

And then the question arises:  what would be the effects
of a previous band on us?