Multiple Choice
What is a planetary nebula?
A) Gas ejected from a low-mass star in the final stage of its life
B) Gas created from the remains of planets that once orbited a dead star
C) Interstellar gas from which planets are likely to form in the not-too-distant future
D) The remains of a high-mass star that has exploded
Correct Answer:
Verified
Correct Answer:
Verified
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