a person or thing that retracts. Anatomy. a muscle that retracts an organ or protruded part. Surgery. an instrument or appliance for drawing back an impeding part, as the edge of an incision. a mechanism, device, or the like that regulates retraction: to adjust the retractor on a seat belt.
The Moon orbits Earth in the prograde direction and completes one revolution relative to the stars in approximately 27.323 days (a sidereal month). Earth and the Moon orbit about their barycentre (common center of mass), which lies about 4,600 km (2,900 mi) from Earth's center (about 34 of the radius of Earth).
The moon cannot circle the Earth in a 24-hour period. It takes approximately 27 days for the moon to orbit the Earth. In a one-year period, the moon circles the Earth 13 times.... The moon cannot circle the Earth in a 24-hour period. It takes approximately 27 days for the moon to orbit the Earth.