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

In this activity (on pages 12-15), learners make a crater model and test the effects of weather (rain) on its surface.

In this math-based activity, learners model the intensity of light at various distances from a light source, and understand how astronomers measure the amount of sunlight that hits our planet and othe

In this activity (on pages 6-11), learners work as a team to investigate how impact craters on Earth, the Moon or other planets take shape and what patterns they make.

This fun and simple hands-on astronomy activity describes techniques scientists use to find planets orbiting other stars.