Gregory Vogt

An introduction to the bluish-green planet, discovered in 1718 by Frederich Herschel.

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

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

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.

Describes the planet Jupiter and its surface features, atmosphere, rotation and orbit, moons, and more.

Presents information on Mercury, the planet closest to the sun, as it was photographed by the U.S. spacecraft, Mariner 10. Includes a glossary and "Mercury Quick Facts."

Earth's outer atmosphere is the transition zone between the planet and outer space. This sphere begins at the upper levels of the atmosphere and stretches out thousands of miles from Earth. While it appears empty, this sphere actually contains small amounts of gas, but the atoms of gas are so widely spaced that no life can exist. As the place where Earth first interacts with the Sun's energy, the outer atmosphere is crisscrossed by radiation and intense...

A brief history of NASA's development, from its early stages ofresearch, through the space shuttle programs, to conjectures about future projects in space research and travel.

Explains different types of space robots and their uses.