lamont
Contributor
Hank49:Soggy, I've done a lot of searching on the subject of "before the big bang", and although some speculate that there was "nothing" as in time or space, as you stated, not all the experts agree and others say there is absolutely no way of knowing ( which I agree with so, my statement, how can we know the age of it?). Just to clarify my post that started our discussion on this, this is what I meant when I said we don't know the age of the universe, which by my definition included whatever was there before the Bang. You are convinced there was nothing and I respect your belief, but there is no proof of it. I agree we can estimate the age of what we see now by measuring the expansion after the bang. What's ironic though, is that if there was "nothing", as in absolutely nothing before the bang (except hydrogen.....and the existance of helium on more distant stars, which casts possible doubt of the "nothing" theory as well as the big bang), that that definition is the epitomy of "Creation".
I had a really nice dissertation on the big bang and big bang nucleosynthesis written up and then I hit the wrong button and my editor ate it.
I think you have some fundamental misunderstandings about what the Big Bang model actually is.
To begin with, the big bang happened everywhere uniformly throughout space. If you take a sufficiently large volume of space around the Earth and compress it sufficiently tightly so that you get a 3000K plasma you have something which approximates the conditions in the early big bang when the CMBR was created. The entire universe (which is probably infinite in all dimensions) was compressed like this. Its kind of like a piston, except there's no walls.
If you go back further then it will become so energetic so that the hydrogen and helium no longer exists and you get quark-gluon plasma which is something like the conditions at the heart of a neutron star (once the entire universe is packed together at the same density as a neutron star).
If you keep increasing the temperature and going backwards in time you wind up in a radiation dominated universe where most of the energy of the universe (which has nearly infinite energy density) is going to be particles like photons. As the universe cools you get matter creation via matter-antimatter creation (you can create electrons and positrons in the lab this way very easily). At some point in the early universe there were CP-symmetry violating processes which favored the creation of matter over antimatter (which has now been observed in B-particle decay and Kaon decay), which was responsible for creating the hydrogen. Then some of the hydrogen fused to form helium and a trace of lithium (and the fractional abundaces of those in big bang nucleosynthesis is very sensitive to the conditions in a brief period of the big bang).
So, the question is not where the hydrogen came from, but where the initial infinitely dense universe came from...
(I actually had a longer writeup than this before my editor ate it...)