The Moon is the swiftest of all the celestial bodies. She travels through the Zodiac in approximately 28 days, and spends two and a half days in each sign. Her daily motion is an average of 12 degrees. Distance from Earth: 384 000 km. Mass: slightly over one thousandth of the Earth's. Water is her element. Her nature is cold and moist. She rules Cancer and she is in exaltation in Taurus.