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Subject: Astronomy & Space Sciences

Discover why the sky is blue and the sunset is red.

Turn an old CD into a spectroscope to analyze light.

Create a scale model of the earth-moon system using different-sized spheres.

Prove to yourself that Galileo was right.

Just spew it—build your own cyclic hot water fountain.

Why is the sky blue? That's a sticky question.

Measure the height of an object indirectly using your hand and a ratio.

Find the height of a tree, paper rocket or North Star.

Watch the rise and fall of hot and cold fluids.

Visualize the spectacular fluid motion of convection cells.

Explore the twinkling of stars by beaming a laser pointer over a hot plate.

Model the patterns of sunlight and shadow on Earth.

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