A red giant's core consists largely of helium as helium was produced during the main sequence phase. Thus helium fusion replaces hydrogen fusion. But as iron is the by-product of helium fusion, a red giant's core turns slowly into iron...
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A red giant's core consists largely of helium as helium was produced during the main sequence phase. Thus helium fusion replaces hydrogen fusion. But as iron is the by-product of helium fusion, a red giant's core turns slowly into iron...
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