| EVENT | PARTICLES | TIME | REDSHIFT | HORIZON SIZE | TEMPERATURE | ENERGY | DENSITY |
| t | z | dH | T | kT | r (g/cm3) | ||
| quantum gravity | primordial black holes | ||||||
| gravity decoupled | gravitons | 0.5x10-43 s | 10 32 | 10-35 m | 1032 K | 1019 GeV | > 1e94 |
| Inflation began (GUT) | 10-35 s | 10 28 | 10-27 m | 1028 K | 1015 GeV | 1095 erg | |
| strong force decoupled | 10-34 s | 1027 K | 1014 GeV | ||||
| Inflation ended | q,q,e,e,n,n,t,t,m,m,W-,g | 10-33 s | 10 27 | 1 | 1027 K | 1015 GeV | |
| quark era | 10-23 s | 10 21 | 1021 K | 109 GeV | 1.E+55 | ||
| electroweak transition | p,p,n,n,e,e,n,n,t,t,m,m,W- | 10 ps = 10-11 s | 10 15 | 1015.5 K | 300 GeV | 3.E+27 | |
| quarks -> hadrons | p,n,e,e,n,n,t,t,m,m | 1 ms = 10-6 s | 10 12.5 | .1 ly | 1013 K | 1 GeV | 4.E+17 |
| 0.01 ms | 10 12 | .3 ly | 1012.5 K | 272 MeV | 3.E+15 | ||
| antiprotons annihilate | muons anihilate | 0.1 ms | 10 11.5 | 1 ly | 1012 K | 86 MeV | 4.E+13 |
| 1 ms | 10 11 | 3 ly | 1011.5 K | 27 MeV | 3.E+11 | ||
| p~n,e,e,n,n | 0.01 s | 10 10.5 | 10 ly | 1011 K | 8.6 MeV | 4.E+09 | |
| 62%p,38%n,e,e,n,n | 0.1 s | 10 10 | 30 ly | 1010.5 K | 2.7 MeV | 3.E+07 | |
| neutrinos decouple | 76%p,24%n,e,e,n | 1 s | 10 9.5 | 100 ly | 1010 K | .86 MeV | 400,000 |
| ee annihilate | 83%p,17%n,e,n | 14 s | 10 9 | 300 ly | 109.5 K | .27 MeV | 3,000 |
| D,He form, free n decay | 86%p,14%n,e,n | 3 min | 10 8.5 | 1000 ly | 109 K | 86 keV | 40 |
| Nucleosynthesis begins | p+n => D | 3.75 min | 10 8.5 | 1000 ly | 109 K | 80 keV | |
| He | 30 min | 10 8 | 3000 ly | 108.5 K | 28 keV | ||
| CMB spectrum fixed | p, e, He | 1 month | 10 6.5 | 100000 ly | 107 K | 500 eV | |
| 3,000 y | 100,000 | 300000 ly | 300,000 | 26 | |||
| matter-radiation equality | 75,000 y | 3233 | 4x106 ly | 9000 K | 5.5 eV | 1x10-17 | |
| Recombination | p+e => H | 200,000 y | 0.4 eV | 0 | |||
| Decoupling begins | 320,000 y | 1186 | 3235 | 0.28 | 10mp/mm3 | ||
| Decoupling | 379,000 y | 1089 | 107 ly | 2967 K | 0.26 eV | 8mp/mm3 | |
| Decoupling ends | 438,000 y | 990 | 2700 | 0.23 | 6mp/mm3 | ||
| Reionization | 1st stars | 180,000,000 y | 20 | 57 | 5 | 1Ms/(30ly)3 | |
| Earliest galaxy observed | 1st galaxies | 850,000,000 y | 6.58 | 20 K | 1.72 | 2613 | |
| Solar System | 9,100,000,000 y | 0.44 | 3.9 | 0.34 | 18 | ||
| matter-L equality | 9,500,000,000 y | 0.39 | 3.8 | 0.33 | 16 | ||
| life on Earth | 10,200,000,000 y | 0.31 | 3.6 | 0.31 | 13 | ||
| Today | 13,700,000,000 y | 0 | 1010 ly | 2.725 K | 0.25 meV | 6mp/m3 |