| Topic: |
Science > Physics |
| User: |
"G. Ralph Kuntz, MD" |
| Date: |
05 Apr 2007 02:55:16 PM |
| Object: |
Q: big bang |
At some fraction of a second after the big bang, the universe was a
few centimeters across. That means that there was stuff close to the
center of the mass and stuff close to the "surface" (proof by
induction - pick a particle; if there is another particle further from
the center, select it; repeat until there are no particles further
from the center).
Assuming that the universe kept expanding for 13.7 gigayears and the
stuff coalesced into galaxies, shouldn't some of the stuff that was
originally near the surface still be near the surface (or edge) of the
universe?
I guess this assumes that space is flat and does not curve in on
itself.
If so, would it be the case that beings on one of those galaxies close
to the edge see other galaxies in only one direction?
.
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| User: "Sam Wormley" |
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| Title: Re: Q: big bang |
05 Apr 2007 03:01:39 PM |
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G. Ralph Kuntz, MD wrote:
At some fraction of a second after the big bang, the [observable] universe was a
few centimeters across. That means that there was stuff close to the
center of the mass and stuff close to the "surface" (proof by
induction - pick a particle; if there is another particle further from
the center, select it; repeat until there are no particles further
from the center).
The [observable] universe is likely embeded in a much larger universe
implies there is/was no surface/edge.
No Center
http://www.astro.ucla.edu/~wright/nocenter.html
http://www.astro.ucla.edu/~wright/infpoint.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
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| User: "smallpond" |
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| Title: Re: Q: big bang |
05 Apr 2007 04:15:48 PM |
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On Apr 5, 3:55 pm, "G. Ralph Kuntz, MD" <g...@usa.net> wrote:
At some fraction of a second after the big bang, the universe was a
few centimeters across. That means that there was stuff close to the
center of the mass and stuff close to the "surface" (proof by
induction - pick a particle; if there is another particle further from
the center, select it; repeat until there are no particles further
from the center).
Your proof is circular. If you assume a center of mass then, then
there
is a center of mass now. Where is it?
--S
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| User: "malibu" |
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| Title: Re: Q: big bang |
05 Apr 2007 04:56:57 PM |
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On Apr 5, 3:15 pm, "smallpond" <smallp...@juno.com> wrote:
On Apr 5, 3:55 pm, "G. Ralph Kuntz, MD" <g...@usa.net> wrote:
At some fraction of a second after the big bang, the universe was a
few centimeters across. That means that there was stuff close to the
center of the mass and stuff close to the "surface" (proof by
induction - pick a particle; if there is another particle further from
the center, select it; repeat until there are no particles further
from the center).
Your proof is circular. If you assume a center of mass then, then
there
is a center of mass now. Where is it?
--S
Also, if ALL THERE IS used to be so small,
what was it smaller than then that it isn't
smaller than now?
John
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