•10-45 sec Quantum gravity? Physics not understood
•10-34 sec 1026 K Nuclear strong force/electro weak
force separate
(inflation, matter/antimatter
asymmetry)
• 10-7 sec 1014 K Protons,
AntiprotonsÛphotons
• 10-4 sec 1012 K Number of protons frozen
•
4 sec
1010 K
Number of electrons
frozen
•
2 min Deuterium nuclei begins to
survive
•
3 min 109 K Helium nuclei begin to
survive
• 30 min
108 K
T, r too low for more
nuclear reactions
(frozen number of D, He -- critical
prediction)
•300,000 yr 104 K Neutral H atoms begin to
survive
(frozen number of photons –
critical prediction)
• 1 billion
yr Galaxies begin to
form
•13 billion yr
Present time