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Exploring the Planets
This online exhibit from 2002 "highlights the history and achievements of planetary explorations, both Earth-based and by spacecraft." It features information about tools of exploration and about the planets, asteroids, and comets in our solar system. Information for planets includes atmosphere, moons, magnetic fields, images, and more. From the Smithsonian National Air and Space Museum.
http://www.nasm.si.edu/research/ceps/etp/etp.htm

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