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Ben’s "Micronova Hypothesis" starts with the Sun. Stars burn down a potential energy decay curve, hydrogen to helium to heavier elements until they hit iron. Our Sun is too small to nova in the textbook sense, the Chandrasekhar limit requires 1.4 solar masses and we have nowhere near that, but Ben argues we suffer from a different problem, which is that helium-4 is fusion ash. The Sun can transmute everything else down to iron, but the helium-4 just accumulates in bands at roughly 40% and 80% out from the core, like cholesterol in the arteries of a star. Eventually the pressure becomes unsustainable, and the Sun must erupt.