Discusses humanity's exploration of the planets in our solar system, with an emphasis on the unmanned space flights to the gas giants on the outside of the system.

Chronicles NASA's efforts to explore the moon, from photographing the surface by Pioneer and Ranger spacecraft to the Apollo landings. Discusses scientific discoveries and the possibility of setting up a moon colony.

Explores the development and applications of military and civilian satellites designed to observe the earth and send back information about land and inland water areas, vegetation and crops, violent storms and dangerous weather, and nuclear activities.

Focuses on NASA's plans to design a permanently manned space station in the mid 1990's which would enable scientists to explore and colonize the moon.