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Explains how scientists search for life in other parts of the universe, discussing alien life, exobiology, interstellar contact, spacecraft missions, and other related topics.

Contains alphabetically arranged entries that provide definitions and explanations of terms and concepts related to the field of space exploration; and includes over one hundred black-and-white photographs, as well as a color insert.

Traces the history of space technology and space flight since the early 1960s including the International Space Station, space shuttles, expeditions to Mars, and the Mercury, Gemini, and Apollo projects.

A comprehensive encyclopedia of space and astronomy with over 3000 cross-referenced entries, essays, photographs, and charts on subjects such as the Apollo project, center of gravity, robotics in space, satellites, and UFOs.