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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity demonstrates the shadow of the Earth as it rises as a dark blue shadow above the eastern horizon. Shadows are not just what we see on the sidewalk,...

    $5 - $10 per group Ages 6 - adult 10 to 30 minutes
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    American Association for the Advancement of Science
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    Learners investigate why the Sun and Moon appear the same size in the sky even though the Sun is over 400 times larger in diameter. Learners use discs of different sizes and view them from at least...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    American Museum of Natural History
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    In this nighttime, outdoor activity, learners keep a record of what they see in the sky by drawing constellations, the Moon, and making note of the weather and conditions each day. Learners can...

    $1 - $5 per student Ages 8 - 14 1 to 7 days
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    The Exploratorium
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    In this activity, learners explore why the sky is blue. Learners model the scattering of light by the atmosphere, which creates the blue sky and red sunset, using a flashlight and clear glue sticks...

    $1 - $5 per student Ages 8 - 14 5 to 10 minutes
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    NOAA
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    Learners complete a series of hands-on and investigative activities to explore cumulus clouds. Learners observe cumulus clouds outside, read a book about how cumulus clouds differ from other clouds...

    $5 - $10 per group Ages 4 - 11 30 to 45 minutes
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    Astronomical Society of the Pacific
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    In this activity, learners use a simple 3D model to discover why the Moon has phases. This activity is a very rewarding "ah-ha!" moment for learners since it helps to correct one of the...

    $5 - $10 per group Ages 6 - adult 10 to 30 minutes
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    CSIRO
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    In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red. Learners will discover that the sky appears a different color...

    1 cent - $1 per group Ages 11 - 18 5 to 10 minutes