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1997. Ormiston H. Walker. Activities and experiments in this book explore four main areas: the physics of space flight, space vehicles, probing the cosmos, and humans in space. The activities clarify abstract principles and explain processes such as flight aerodynamics, geosynchronous orbit, inertia wheels, tracking with Doppler, crystals grown in space, physics of light, galaxies, recycling in space, and farming in space. An ideal companion to Astronomical! by the same author. 150 pages, soft cover, full-color photos and b&w illustrations. Grades 6Ð12.