Re: Localized Big Bang


<gandalf@xxxxxxxxxxx> wrote in message
news:1179589589.443709.97060@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Greetings and Salutations:

From: "Greg Neill" <gneill...@xxxxxxxxxxxxxxx>
If there
are other universes with their own Big Bang events, they
are unconnected to ours, cannot be observed, and have no
influence at all on our universe.

O.K... So even if light from the "other universe" were to enter our
universe then that would constitute "connecting" the universes.
Correct?

By implication, yes. Unless there was some pre-existing
connection, or in other words unless the two regions
were parts of a single universe looking perhaps like a
dumbbell, there would be no path for the light to travel
along to get from one to the other.

On Apr 29, 10:06 am, "N:dlzc D:aol T:com \(dlzc\)" <d...@xxxxxxx>
wrote:
This doesn't mean that there may not be other Universes fully
parallel to ours, or that they might not intermingle at some
point in the future. Just nothing like that has happened in the
~13 Gy displayed.
David A. Smith

Since everything is moving away from a central point, another universe
colliding with ours would (by definition) have objects moving from
*that* central expansion point.

No! There is no "central point" in current cosmological
models, our universe is probably infinite in size and by
measurement the section we can observe appears homogenous
and isotropic, the same (on average) everywhere.

Any other universe might also be infinite in size and by
definition must be totally unconnected to ours.

Thank you.

These responses answered my question.

Before thinking you understand these ideas, please look
at Ned Wight's tutorial:

http://www.astro.ucla.edu/~wright/cosmolog.htm

He was one of the team that ran the COBE mission whose
members recently received the Nobel prize.

HTH
George


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