Good discussion!

Hey a few more questions from this (apparent) sub-laymen:

1) Why do some galaxies collide if everything is supposed to be expanding?  I
assume that the reason is some post BB phenomenon, but have no idea what that
might be.

2) I'm not a proponent of the steady state theory, so please don't interpret
this question as such, I just want to juxtapose stuff that I've read.  One of
the arguments against the steady state idea is the problem of entropy, but
doesn't the BB violate conservation of matter? Where did all this stuff come
from?  I read something Hawking wrote to the effect that matter came from
energy and that energy came from gravity, but where did the gravity come
from?  

Editorial comment:  Of course the Pope likes the big bang theory, it verifies
his cannon: "Let there be light"!!! 8^)

Doug

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