What is the period of the moon's orbit around the Earth?

The period of the moon's orbit around the Earth is approximately 27.3 days, which is known as the sidereal month. This duration represents the time it takes for the moon to complete one full orbit around the Earth relative to the stars. This value is significant because it reflects not only the moon's motion but also its gravitational interaction with the Earth and the influence of the Earth's rotation.

While approximately 28 days is often cited, this number is a rounded average that simplifies the lunar cycle for general understanding. The different figures associated with the other options do not accurately reflect the actual sidereal period of the moon, which has been observed and confirmed through various astronomical studies. Understanding the moon's orbital period is essential in fields such as astronomy, navigation, and hydrographic surveying, as it impacts tidal patterns and lunar positioning.