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Smithsonian Institution

National Air and Space Museum: Exploring the Planets: Early Discovery

For Students 9th - 10th
This section of the exhibition gives the history of the discovery and study of space starting with the Greeks and Romans through to the early 1900's.
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NASA

Nasa: The Space Place: Keck Interferometer

For Students 3rd - 8th
This site from the National Aeronautics and Space Administration provides the opportunity to solve a crossword and learn about the world's biggest telescopes.
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Cool Math

Coolmath: Science Monster: Introduction to Our Solar System

For Students 3rd - 8th
Find out about all the planets and other solar system characteristics in this colorful, illustrated tutorial on our neighborhood in space.

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