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Posted by on Thursday, May 12, 2011 at 11:23pm.

Only one side of the moon is visible from Earth because...

A. the moon does not rotate on its axis.
B. the moon does not revolve around Earth.
C. the moon rotates faster than it revolves.
D. the moon revolves once and rotates once in the same period of time.

I chose D. Is that correct?

  • Astronomy - , Thursday, May 12, 2011 at 11:27pm

    You are correct.

  • Astronomy - , Thursday, May 12, 2011 at 11:36pm

    Yes, the answer is D. Most moons of the solar system are "tidally locked" by nonspherical bulges so that the moon keeps one side facing the planet that they orbit.

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