(March 14, 2013 at 11:29 am)Chuck Wrote:(March 14, 2013 at 9:34 am)little_monkey Wrote: Often theists have made the argument that the universe comes from a singularity (BBT) and claim that only God could have created that singularity. I made my arguments here that the universe was never a singularity: http://soi.blogspot.com/
Any comments?
State of the art in physics can not reach to the point where singularity occurs, so we know nothing further of what happened before we actually come to singularity. So singularity is a stand in for "unknown". But at the points after the notional singularity when modern physics can still reach, the universe was already so compact that if matter was all there was, it was already inside its own schwartzchild limits. So the schwartzchild argument fails the smell test. The argument probably fails due to lack of account for negative gravity and dark energy in the energy equation, nor the inflation and expansion of space itself.
Some theories suggests that right before the comfort zone of modern physics, but after the notional singularity, gravity was briefly repulsive instead of attractive. If true, this would put paid to any schwartzchild like argument about how big the universe must have been at the beginning.
Thanks for the comment. Yes indeed, at planck level no one really knows what happens. In fact Arkani-Hamed has argued that at planck level, any energy used to probe that scale would result in that probing energy collapsing into a black hole, hence nature has tricked us in denying any investigation at planck level. The only way out of this is if GR and QM are no longer valid at planck scale.
