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In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.

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 two-part activity, learners explore the Earth and Sun's positions in relation to the constellations of the ecliptic with a small model.

This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole.