Presents information on Mars, the reddish orange planet, and its exploration by the U.S. spacecraft, Mariner and Viking. Includes a glossary and "Mars Quick Facts."

Provides information about the origins, composition, and appearances of comets, meteors, and asteroids.

Describes the similarities and differences between the three planets closest to Earth and provides information about their surface features, physical makeup, and more.

Describes the size, characteristics, and composition of the planet Jupiter.

Presents information learned by past and present observers of Mars, the fourth planet from the sun, and briefly describes the scientific missions that have been sent there.

Discusses facts about Earth, the "Blue Planet."

Discusses facts about Mars, the "Red Planet."

Describes the formation, orbit, surface features, exploration, and future study of our moon.

The eighth planet from the sun, Nepture is a cold, giant planet in the farthest reaches of the solar system. Neptune is known for its blue color, strong storms, and deep atmosphere. Learn these facts and more.