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