Multiple Choice
What does Hubble's law tell us?
A) The faster a spiral galaxy's rotation speed,the more luminous it is.
B) The longer the period of a Cepheid variable,the greater its luminosity.
C) For every force,there is an equal and opposite reaction force.
D) The more distant a galaxy,the faster it is moving away from us.
Correct Answer:
Verified
Correct Answer:
Verified
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