formation of atoms

The era of cosmological recombination

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In the depths of the cosmos, at a time when the Universe was in a state of transformation, a crucial phenomenon changed the very shape of everything that would become our cosmic environment. This phase, known as the cosmological recombination epoch, marks a decisive turning point in the history of the primordial Universe. Several hundred … Read more

The formation of the first atoms after the Big Bang

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La formation des premiers atomes après le 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