carbon-nitrogen-oxygen cycle

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carbon-nitrogen-oxygen cycle:

see nucleosynthesisnucleosynthesis
or nucleogenesis,
in astronomy, production of all the chemical elements from the simplest element, hydrogen, by thermonuclear reactions within stars, supernovas, and in the big bang at the beginning of the universe (see nucleus; nuclear energy).
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carbon–nitrogen–oxygen cycle

See carbon cycle.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
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