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helps find NASA space science resources for learning. Hundreds of resources can be sorted by science type (earth, physical, or space), or by grade range. Topics include algebra, atoms, big bang, black holes, comets, cosmic distances, energy, force and motion, geometry, graphing, gravity, heat, light and color, measurement and estimation, planets, satellites, solar energy, solar system, space missions, stars, telescopes, and waves. (National Aeronautics and Space Administration)
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