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

“Exploring the Universe: Orbiting Objects” is a hands-on activity that invites visitors to experiment with different sized and weighted balls on a stretchy fabric gravity well.

In this activity (on page 14 of PDF), learners use a pan full of flour and some rocks to create a moonscape.

This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.