7 déc. 302855126 av. J.-C. - Nucleosynthesis
Description:
Nucleosynthesis, from 3 minutes to 20 minutes:
The temperature of the universe falls to the point (about a billion degrees) where atomic nuclei can begin to form as protons and neutrons combine through nuclear fusion to form the nuclei of the simple elements of hydrogen, helium and lithium. After about 20 minutes, the temperature and density of the universe has fallen to the point where nuclear fusion cannot continue
Ajouté au bande de temps:
the big bang
The big bang theory timeline
Date:
