Review article Onbig Bangnucleosynthesis and formation of elements in stars

Baryons, especially protons and neutrons, the main constituents of observable matter, were first formed from energy in the early stages of the development of the universe after the Big Bang (according to the Big Bang theory), and hydrogen and helium atoms were created. Later, new and heavier atomic nuclei were formed inside stars from the existing elements by nuclear reactions. The present article focusses on the processes involved in both Big Bang nucleosynthesis and stellar nucleosynthesis.