| Topic: |
Science > Physics |
| User: |
"Ebenezer T. Squint" |
| Date: |
16 Nov 2003 11:43:15 PM |
| Object: |
Strings and New Steady State Theory? |
Hello group, I recently saw an episode of NOVA on the PBS network, the
subject of which was string theory. Having not read any string theory
myself, I was wondering if you could clear up some points.
A theory was mentioned about the creation of matter in the universe, which
seems to be a variation on the "steady state" theory. It said that along one
of the invisible higher dimensions of spacetime, there are parallel
universes, and they are a finite "distance" apart along this higher
dimension, and they are somewhat ripply, like gigantic sails on a ship.
Occasionally two neighboring universes wobble so close together that they
collide, and the point of each collision is the site of a "mini-bang"
creating vast amounts of matter and energy in both universes.
I seem to remember reading in Scientific American that our universe
resembles a large "foam" with most of the galaxies distributed as if on the
surface of the "bubbles" of this foam. Could each of these "bubbles" in fact
be a collision event, with the matter expanding from the centre of the
bubble representing the shock front?
If this theory is true, would it perhaps explain why the universe (or at
least our part of it) contains matter instead of antimatter? There are two
directions along this unseen dimension from which a universe collision could
come, so could this be the factor that decides whether a collision produces
matter or antimatter? Am I correct in believing that space is so vast, that
it's possible for two shock fronts, one of matter and the other of
antimatter, to pass through each other without significant numbers of
annihilations giving away their nature to observers?
Wouldn't some of the more recent inter-universe collisions show up in
telescopes as large, rapidly expanding balls of extremely hot, relatively
unorganized matter? A "mini-bang" right in front of our eyes, as it were?
Could this be in fact what quasars are?
Could some of the more nearby universe collision sites be the cause of the
occasional mass extinctions known on the earth, showering the planet with
large amounts of radiation and debris?
This theory seems to suggest that space and time always have been and always
will be, and it's only the matter (and antimatter) that's constantly being
created and decaying. Is this credible? If the amounts of material being
created in these collisions overtakes the process of decay, could it lead to
a "big crunch"?
Thanks in advance.
.
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