Journey Into Space: Gravity, Orbits, and Collisions
Space Astronomy and Space
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Big Dipper Mobile

On Earth, the Big Dipper looks like a giant connect-the-dots puzzle page. Hundreds of light years away in space, though, you'd have a hard time recognizing the constellation. See why with a make-it-yourself mobile.

http://ology.amnh.org/astronomy/stufftodo/dipper.html
   
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