The period of rotation of the Moon on its axis is __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — about 27.3 days
The Moon rotates on its own axis in approximately 27.3 days, perfectly matching the period of its orbital revolution around the Earth. This synchronous rotation is why the same lunar hemisphere always faces Earth, a core concept detailed in Bowditch for celestial navigators.
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