Discusses the orbit, atmosphere, moons, surface features, exploration, and other aspects of the planet Saturn.

Discusses the surface features, atmosphere, orbit, moons, rings, and exploration of the planet Uranus.

Presents information on Pluto, the farthest known planet, and its moon, Charon. Includes a glossary and "Pluto Quick Facts."

Text and photographs present information on Mars, the reddish orange planet, and its exploration by the United States spacecraft, Mariner and Viking.

Presents information on the different types of celestial matter known as asteroids, comets, and meteors and on what scientists learned from the impact of a comet on the surface of Jupiter.