The event that follows the asymptotic giant branch (AGB) phase in the life of a low-mass star is
A) the ejection of a planetary nebula.
B) core collapse and a supernova explosion.
C) helium flash and the start of helium fusion in the core.
D) the onset of hydrogen fusion in the core.
Correct Answer:
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Q22: In the asymptotic giant branch (AGB) phase
Q23: A planetary nebula is a
A) cloud of
Q24: Which of these important components does
Q25: What physical process provides the energy for
Q26: What will be the mass of the
Q28: A planetary nebula is created
A) over several
Q29: How much mass are planetary nebulae estimated
Q30: What happens to the outer layers of
Q31: What is the difference between a "helium
Q32: In astronomical terms, planetary nebulae are
A) very
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