Re: Expansion of the universe
From: Vinny Vin (facist_at_bush.net)
Date: 10/07/04
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Date: Thu, 07 Oct 2004 01:53:20 -0500
You're really stuck on this Bush-branes thing, arent you? Its all a joke.
Luke Valens wrote:
> Sam Wormley <swormley1@mchsi.com> wrote in message news:<gGy8d.335202$Fg5.107@attbi_s53>...
> > john wrote:
> > > Ok, so the universe is expanding because every point in the universe
> > > seems to be moving away from every other point. This seems a fair
> > > asumption, however something troubles me here. When we look back into
> > > space it seems we also look back in time. Now let say the universe is
> > > 15b years old and we have a really super telescope the can see some
> > > distant galaxy at a distance of 12b light years from earth, therefore
> > > we are looking 12b year back in time. This suggests that if we can
> > > see this distance from every direction then the diameter of this
> > > 'sphere' of the visible universe is 24b light years across. Surely so
> > > far back in time when the universe was only 3b years old how could it
> > > have expanded from the single point of a big bang to such a size.
> > > When the universe was 3b years old, the greatest distance any matter
> > > could have travelled is only 3b light years is it not?
> > > can someone help me out here?
> > > john.
> >
> > We only see a small fraction of possibly an infinite universe.
> >
> > No Center
> > http://www.astro.ucla.edu/~wright/nocenter.html
> >
> > Also see Ned Wright's Cosmology Tutorial
> > http://www.astro.ucla.edu/~wright/cosmolog.htm
> > http://www.astro.ucla.edu/~wright/cosmology_faq.html
> >
> > WMAP: Foundations of the Big Bang theory
> > http://map.gsfc.nasa.gov/m_uni.html
> >
> > WMAP: Tests of Big Bang Cosmology
> > http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html
>
> String theory tells us that the big bang could actually have been our
> "brane" bumping into another "brane", causing a release of energy.
>
> My understanding of all this: String theory provides that the most
> basic unit of anything is a "string", or a small, vibrating, open or
> closed loop of energy. The way this string vibrates determines the
> matter or energy that it makes up. It is theorized that these strings
> can expand to enormous sizes, eg the size of our universe. Such a
> string would be a 3 dimensional "flattened bubble", refered to as a
> membrane, or "brane". Many branes could exist as parallel universes,
> floating in a higher dimensional space. These branes would kinda be
> like slices of bread, with a different universe on each slice
> (remember that our entire observable universe is confined to our own
> slice of bread; we cannot see other slices). Every open string has its
> two endpoints permanently fixed on the brane, but gravitons (closed,
> free-floating loops of string) can "eminate" from the brane. So, it is
> theorized that when two branes collide, they release energy. This is
> used to explain the big bang, but in this theory all the matter did
> not have to be confined to a single point.
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