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    National Museum of American History
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    In this activity, learners will use Google Sky to observe features of the night sky and share their observations. Learners partake in a "Telescope Treasure Hunt" as they look for...

    free Ages 4 - 11 10 to 30 minutes
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    Optical Society of America
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    In this activity, learners complete a series of drawing activities to explore scale and powers of 10. Learners first trace each other on 1-meter-square pieces of paper. Next, they trace a found...

    1 cent - $1 per student Ages 14 - 18 30 to 45 minutes
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    The University of Texas McDonald Observatory
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    In this activity, learners test the Law of Reflection based on experimental evidence. Learners produce raw data and explanations based on their data: pencil tracings of incident and reflection rays...

    $1 - $5 per group Ages 14 - 18 45 to 60 minutes
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    NISE Network
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    Space telescopes can offer us better, clearer views of the universe (and of our own planet) than Earth-based telescopes can, but getting these large, delicate pieces of equipment into orbit is...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes