Gravitation

The moon is, in fact, attracted by the sun and revolves around it. More specifically, the sun attracts the earth-moon system and makes the whole system to revolve round the sun. The attraction of the earth is just a perturbation to the the sun's attraction on the moon. Thus, the path of the moon, as viewed by an observer outise the solar system, is a series of small "circles" superimosed on a large circular orbit round the sun.