Cosmological Timeline
Big Bang to present — key epochs and approximate times.
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timeline
title Cosmological epochs (since Big Bang)
0 s : Planck epoch : Grand unification
10^-32 s : Inflation
10^-6 s : Quark-hadron transition
1 s : Neutrino decoupling
3 min : Big Bang nucleosynthesis
380,000 yr : Recombination — CMB released
~150 Myr : First stars / reionisation
~9 Gyr : Solar system forms
~13.8 Gyr : Today