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The Thousand-Yard Model
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This is a classic exercise for visualizing the scale of the Solar System.
The Drake Equation
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In this math activity, based on the research of famed astronomer Frank Drake, learners calculate the possibilities of finding intelligent life elsewhere in the universe besides Earth.

Oil Spot Photometer
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.