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In this activity, learners make a scale model of the Solar System and learn the real definition of "space." Learners use the online calculator to create an appropriate scale to use as a basis for thei

In this craft activity, learners create a string of cut-out moons and stars.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

This is a classic exercise for visualizing the scale of the Solar System.