Inflationary universe
Initial conditions of the universe
Photon decoupling
Leptogenesis
Neutrino decoupling
Baryon acoustic oscillations
Recombination (cosmology)
Primordial galaxies
Reionisation
Reionization
Origin of the universe
Baryogenesis
A qualitative term used to describe a phase in the history of the Universe, from the Big Bang event to the apparition of the first structures (seeds of future galaxies), at a redshift around 30.
Early universe