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This is an activity about Saturn's rings. Learners will will build simulated Saturnian rings and then shine a flashlight through them to understand how stars can be seen through Saturn's rings, even though the rings look solid from a distance. Saturn’s rings are actually composed of millions of orbiting particles, mostly grains of water ice. This activity is part of "Ways of Seeing," an interactive, educational CD-ROM from NASA's Cassini Program. The Cassini spacecraft is the first to explore the Saturn system of rings and moons from orbit.