Astronomy and astrophysics Large-scale structure and physical cosmology Concept
Big Bang nucleosynthesis
Summary
Big Bang nucleosynthesis is the production of the light nuclei, deuterium, helium-3, helium-4 and a little lithium-7, in the first minutes after the Big Bang. Its predictions depend mainly on one number, the ratio of baryons to photons. About one quarter of the ordinary mass is in helium-4. The agreement of predicted and observed abundances is a central test of the hot Big Bang model.
Further reading
About this page
| Tag | QFVQYADN4P |
|---|---|
| URI | m2://QFVQYADN4P |
| Kind | concept |
| Writing | W0 stub |
| MSC | 85A40, 83F05 |
| Same as | |
| Changed | 3 November 2026 |
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