EAE1011 Lecture Notes - Lecture 20: Big Rip, Lead, Weakly Interacting Massive Particles
10 Aug 2018
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Where did it all come from: the universe started with the appearance of space, time, and mass, before that (cid:449)ell, there (cid:449)as (cid:374)o (cid:862)(cid:271)efore(cid:863, before implies time, and time started when the universe did. Clues: theoretical physics, the big bang theory, everything was once smaller than a pea. It exploded out from there: the big bang occurs, then everything expands outwards from there. Initial inflation of the universe is exponential from 10 to -35 times secs(quark soup) to around. 10 to -(cid:1007)(cid:1006) ti(cid:373)es se(cid:272)s : expands in that time to 10 -30 times original size, but expansion is a bit lumpy. 10 to the -30 secs to 10 to the -10 secs: dark matter created holds the structure of the universe together, matter dominates over antimatter. 10 to the -2 secs: 100 billion degrees kelvin, super-high density, photons, neutrons and electrons mixed with smaller numbers of protons and neutrons.
