The time for the moon to repeat its cycle of phases is equal to
A) its sidereal period.
B) one day.
C) one hour.
D) one year.
E) its synodic period.

Question

Quizplus · Accepted Answer

The time for the moon to repeat its cycle of phases is known as the synodic period, which is approximately 29.5 days. This is different from its sidereal period, which is the time for the moon to make one orbit around the Earth with respect to the fixed stars, and is approximately 27.3 days.

The Time for the Moon to Repeat Its Cycle of Phases