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Notes:
For the same reasons as before, the star increases in luminosity and radius. Before even coming close to Carbon ignition, its luminosity becomes so high that its outer envelope is ejected. Short of fuel, what remains shrinks and is fused, and we see a hotter and hotter star. After all remaining fuel is gone, the only thing left for the star is to cool as a white dwarf.
Fig. 17.8 of the book.