What is the last nuclear fusion stage in the life of a low-mass star like the Sun?
A) fusion of silicon nuclei to form iron
B) fusion of oxygen nuclei to form sulfur
C) fusion of helium nuclei to form carbon and oxygen
D) fusion of hydrogen nuclei to form helium
Correct Answer:
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Q32: In astronomical terms, planetary nebulae are
A) very
Q33: A planetary nebula is a(n)
A) contracting spherical
Q34: The fraction of the mass of a
Q36: The shell of a planetary nebula is
Q37: The diameter of a typical planetary nebula,
Q38: The two longest stages in the lifetime
Q39: A planetary nebula is
A) a shell of
Q40: A planetary nebula is a
A) gas shell,
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