The formation of the first atoms after the Big Bang
IN BRIEF Primordial nucleosynthesis: Formation of the first atoms after the Big Bang. Timing: Approximately 380,000 years after the Big Bang. Elements formed: Mainly hydrogen and helium. First molecule: The ion HeH+, possibly the first molecule. Conditions: Initial temperatures around 10^9 K. Electrons and atoms: Electrons combine with nuclei to form atoms. In the vastness … Read more