(fusion reaction starting with neon)
Neon burning consists of two possible sequences of nuclear fusion
reactions leading from neon to magnesium or oxygen, which
takes place in early stars.
A neon-burning shell appears in a sufficiently-massive star
during a phase in the asymptotic giant branch, forming after a carbon-burning
shell and before an oxygen-burning shell (if the latter forms).
Neon burning requires a temperature on the order of
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