Multiple Choice
An astronomer observes many galaxies in distant parts of the sky to have emission lines redshifted relative to the same lines seen in a laboratory.What is the most likely explanation?
A) Space is expanding.
B) The galaxy is experiencing gravitational lensing.
C) The galaxy has a strong wind.
D) The galaxy is moving through space away from the Milky Way.
Correct Answer:
Verified
Correct Answer:
Verified
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