Just as a Low-Mass Main Sequence Star Runs Out of Fuel

question 28

Multiple Choice

Just as a low-mass main sequence star runs out of fuel in its core, it actually becomesbrighter. How is this possible?

• A)Helium fusion gives more energy than hydrogen fusion does, based on masses.
• B)Its outer envelope is stripped away and we see the brilliant core.
• C)The core contracts, raising the temperature and increasing the size of the region of hydrogenshell-burning.
• D)It explodes.
• E)It immediately starts to fuse helium.

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