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Science dealing with the study of space and celestial bodies. Can pertain to the composition, origin, motion, behavior or physical aspects of bodies in space as well as the practical applications of such information (ie: navigation).

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Their claim is incorrect. On an astronomical scale, one kilometer is a very small value. In fact, Earth's orbit regularly varies by far more than 1km. According to the NASA's Solar System Exploration …
answered Mar 2 '15 by KSmarts