One synodic month is longer than one sidereal month by about
A) 1 hour.
B) 2.2 days.
C) 4 minutes.
D) 1 week.

Question

Quizplus · Accepted Answer

A synodic month, the time it takes for the Moon to return to the same phase (e.g., full moon to full moon), is about 29.5 days long. A sidereal month, the time it takes for the Moon to return to the same position against the stars, is about 27.3 days. The difference is approximately 2.2 days, making the synodic month longer by about that amount.

One Synodic Month Is Longer Than One Sidereal Month by About