A planetary nebula is a
A) cloud of gas surrounding a very young star in which planets are expected to form.
B) spherical, rapidly expanding cloud of gas produced by a supernova explosion.
C) gas cloud surrounding a planet after its formation.
D) shell of gases ejected from the surface of red giant star.
Correct Answer:
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Q18: A low-mass giant on the horizontal branch
Q19: Consider a group of stars with masses
Q20: Consider a group of stars with masses
Q21: What is the name given to the
Q22: In the asymptotic giant branch (AGB) phase
Q24: Which of these important components does
Q25: What physical process provides the energy for
Q26: What will be the mass of the
Q27: The event that follows the asymptotic giant
Q28: A planetary nebula is created
A) over several
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