What do a reflection nebula surrounding a star and Earth's atmosphere have in common?
A) The reflection nebula and Earth's atmosphere both appear blue because of preferred scattering of this color of light.
B) The reflection nebula and Earth's atmosphere both have about the same temperature.
C) The reflection nebula and Earth's atmosphere have almost the same average density of gas.
D) The reflection nebula and Earth's atmosphere both contain the same types of molecules.
Correct Answer:
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A) optical
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