PlanetWatch is a reference atlas and simulation of our solar system. It combines extensive information about our sun, moon, and the planets of our solar system with color photographs and animated maps. Up-to-date descriptions of each planet's compostion, atmosphere, geology, and more are based on the latest data from Voyager, Galileo, Hubble and other space probes. Orbital and star maps can be set for any date between 1600 and 2400 A.D.