•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
•13.7 billion yr Present time