Re: Where did the CMBR we see from?

In article <1166678323.829977.116990@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"Lion Kimbro" <LionKimbro@xxxxxxxxx> wrote:

* Is it true that the CMBR that we see now, was just a few centimeters
away, way back when?
* Did the rate of increase in the metric expansion of the universe ever
vary, during any time other than just the inflationary period of the
Big Bang?
* That is, once the observable universe was "the size of a grapefruit,"
did it expand quickly again? Or is all of the observable universe due
to steadily accelerating expansion over a long time from the time when
the observable universe was the size of a grapefruit?
* I understand that the amount of "stuff" we can see inside the
observable universe is shrinking, due to the expansion of the universe.
Was it always that way? Was it always the case that we were able to
see less and less and less?

You may want to do some reading on the era of recombination, which will
explain the birth of the CMBR and what we see within it. Infaltionary
expansion made a huge increase in the size of the universe in a very
short time.

http://csep10.phys.utk.edu/astr162/lect/cosmology/inflation.html

"This phase transition is thought to have happened about 10^-35 seconds
after the creation of the Universe. It filled the Universe with a kind
of energy called the vacuum energy, and as a consequence of this vacuum
energy density (which plays the role of an effective cosmological
constant), gravitation effectively became repulsive for a period of
about 10^-32 seconds. During this period the Universe expanded at an
astonishing rate, increasing its size scale by about a factor of 10^50.
Then, when the phase transition was complete the universe settled down
into the big bang evolution that we have discussed prior to this point.
This, for example, means that the entire volume of the Universe that we
have been able to see so far (out to a distance of about 18 billion
light years) expanded from a volume that was only a few centimeters
across when inflation began!"

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