People have gazed up at the cosmos for thousands of years and wondered about the wanderers of the heavens: the planets. The past 20 years have been the golden age of planetary exploration because of many expeditions, most notably the Voyager and other unmanned space craft. This document is a summary of the information known about the planets of the solar system as they are now known. There is discussion on "Interplanetary Spacecraft" and "Comparing the Planets." A chart of 15 unmanned spacecraft denoting the mission, launch date, arrival date, and status is included. (CW)