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Cassini Images Density Waves in Saturn's Rings

The Cassini spacecraft, now orbiting Saturn, is sending back spectacular, detailed images of its immense ring system. This image of Saturn's A ring shows beautifully geometric structures, which scientists hypothesize are spiral density waves. These waves are thought to be caused by a small moon perturbing the orbits of ring particles. Understanding these patterns helps us decipher the complex dynamics of Saturn's rings.