Roosters for ever
Registered Senior Member
The energy in the universe/spacetime, probably came from the decay of what we call inflation...this was a period of "faster then "c" expansion, that occurred for a tiny fraction of a second at about 10-36 seconds post big bang. This did not contravene Einstein's relativity, as it was not matter expanding just the fabric of spacetime. In fact matter of any sort (atoms, neutrons, protons) did not exist at that time. The fundamentals of matter, quarks, electrons etc, condensed as an extremely hot and dense universe cooled, all still within a second post big bang. As temperatures continued to drop, our first basic atomic nuclei, protons and neutrons formed at 3 minutes post big bang. (A good description of this process is given by Stephen Weinberg, in his book "The First Three Minutes")An alternative theory is, that Energy is u8ncreatedable. has always existed, is still there in the pre-universe realm, aka timespace Energytime and is absorbed as our home universe expands.
The opaque universe of quarks, electrons, neutrons and protons, and atomic nuclei, essentially plasma, continued to cool for about 380,000 years until the universe/spacetime had cooled to around 3,000K and electrons started to couple with the atomic nuclei, protons and neutrons, forming our first elements, hydrogen and helium and perhaps a trace of lithium.
From that point it is essentially plain sailing, and our first generations of stars started to form over the next 3 or 4 hundred million years.
These huge, short lived behemoths, (10's of millions of years) then went supernova and the heavier elements started to form.