SkyWeek (Free!)
Keep up with the best celestial sights, and view each event with an interactive sky mapautomatically set to your location.
SkyWeek Plus
Access all the great features of the SkyWeek app, plus sync events to your calendar. We’ll even send you special notifications when the unexpected happens, such as novae, newly discovered asteroids, and more.
JupiterMoons
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.
SaturnMoons
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.
