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