What is the period of the moons rotation on its axis?
The moon keeps one side facing the Earth as it revolves around Earth. This means that for every revolution, there is exactly one rotation. The moon takes about 29.53 days to revolve around the Earth (This is the synodic period: consider the time to go from one ‘new moon’ to the next. The synodic period brings the moon all the way back to the same position relative to the sun). But the moon’s true (sidereal) rotational period is about 27.32 days, because we have to take into consideration that the moon is rotating and orbiting at the same time.
