Multiple Choice
The event that settled the Shapley-Curtis debate about "spiral nebulae" was
A) Edwin Hubble measuring the distance to the Andromeda Galaxy.
B) Arno Penzias and Robert Wilson detecting the cosmic microwave background radiation.
C) Albert Einstein showing that gravity can bend the path of light.
D) Edwin Hubble showing that the universe was expanding.
Correct Answer:
Verified
Correct Answer:
Verified
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