Which nuclear reaction cycle typically dominates hydrogen fusion in the cores of massive stars?
Answer
CNO cycle
Due to the higher core temperature in massive stars, the fusion of hydrogen into helium is often dominated by the Carbon-Nitrogen-Oxygen (CNO) cycle, which is a more efficient mechanism than the proton-proton chain favored by lower-mass stars like the Sun.
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High Mass Stars: Crash Course Astronomy #31 - YouTube
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