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In this space science activity, learners work together to create a human-powered orrery to model the movements of the four inner planets.

In this space science activity, learners explore transits and the conditions when a transit may be seen.

Use this model to demonstrate the goal of NASA's Kepler Mission: to find extrasolar planets through the transit method.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.