Moon toby jug produced in Japan for Vandor of San Francisco, California, circa 1979. The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth. The Moon lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's. A shooting star forms the handle of this jug.