The Scientific Blog: 2021

I just love this particular lecture.

I wonder how dense the universe was when matter ceased to form.

This is because I suspect that in the first iteration the first star was a very huge star, so big in fact that it burned for only seconds, Unfortunately for any such vision a black hole of unimaginable proportions would be formed such that, I have to guess, that galaxy formation would all but cease to exist. It is indeed puzzling that there isn't much thought given to how the density of the universe aged and therefore how big or small the first stars might have been and/or when they formed as the universe expanded and cooled. Oh well, I'll continue to keep an eye out for answers to such questions.

Well, at least I think I've finally figured out why our universe contains mostly matter instead of anti-matter. The answer is it's because of the neutron.

You see, as the universe expanded and cooled down enough so that the plasma formed protons, positrons, negatrons, and electrons, it also formed neutrons.

While all of these particles formed in the same quantities, it's of particular note that when neutrons decay they always emit an electron and not a positron. We see this even today in nuclear physics.

So the neutrons would accumulate while matter and anti-matter went on annihilating themselves, what would be leftover would be a massive amount of neutrons which would then decay to leave behind a universe filled with mostly matter. Why this should be so is probably hidden in the workings of quantum mechanics, whose laws probably do not allow neutrons to decay into anti-matter. So that's my guess on the matter.