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Keep up with the best celestial sights, and view each event with an interactive sky map automatically set to your location.
Track Saturn's nine largest moons using pinch-zoom and time controls that let you customize your view exactly as you like it. Plus get the scoop on the planet, its spectacular rings, and its bizarre family of satellites.
Locate Jupiter’s four largest moons and predict Great Red Spot crossings and moon transits and eclipses. And learn more about Jupiter and its ice-and-fire moons with our encyclopedic descriptions.