Which of the following is not a place where astronomers believe interstellar dust grains can form?
A) in the cooling winds of material ejected from red giant stars
B) in the material flowing out of exploded stars, after it has cooled
C) in denser clouds of interstellar matter
D) in HII regions
E) all of the above are places where dust grains regularly form
Section 20.6: Interstellar Matter around the Sun
Correct Answer:
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Q23: Cosmic rays are
A) high-energy electro-magnetic radiation
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A) a listing of
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