astronautics

More than 1,000 alphabeticallyarranged entries provide information on important astronomical subjects, concepts, and theories.

An account of the worst disaster in the twenty-five-year history of United States space exploration, the loss of the shuttlecraft Challenger and its seven member crew.

Examines the history and missions of manned space flight and the training and duties of both American and Russian astronauts.

Examines the function of NASA and the impact of its various space exploration programs.

Describes the efforts and accomplishments of both the United States and the Soviet Union to develop space stations over the past quarter century.

Discusses what gravity is, what it does, and how it affects people.