The distance from the Earth to the moon is about 60 times the Earth's radius, about 384,000 km. The moon orbits counterclockwise around the Earth. Orbit is slightly elliptical and distance from Earth varies 6 %. Period of the orbit is about 27.3 days. The path of the Earth–Moon system in its solar orbit is defined as the movement of this mutual Centre of gravity around the Sun. Consequently, Earth's Centre veers inside and outside the solar orbital path during each synodic month as the Moon moves in its orbit around the common Centre of gravity.
