The Moon

Recent studies have stated that The Moon's sidereal month is approximately 27.3 days.

Sidereal month is the time that the Moon takes to complete one orbit around the Earth.

The diagram above illustrates the Moon's orbit around the Earth, a rotation that takes approximately 27.3 days.

Relation to the Quran:

The word Moon (Qamar), is used exactly 27 times in the Quran.