Your Complete Android Observatory
Available in English, Deutsch, Français, Italiano & Español
See Mobile Observatory in action
Main Menu
Night Sky View
Twilight Sky
Day/Night on Earth
Solar Eclipses
Tonight in the Sky
3D Solar System
Orion Nebula
Live Solar Images
Know exactly when celestial objects become visible from your location
Calculate precise horizon profiles using NASA SRTM elevation data. See exactly where mountains, hills, and terrain block your view of the sky from your observing location.
Everything you need for stargazing and astronomical observation
Realistic sky visualization for any time and location
Always up-to-date astronomical data
Comprehensive catalogs at your fingertips
Never miss an astronomical event
Start with the free Sky View, then unlock the complete observatory
Explore the Night Sky
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Your Complete Observatory
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Trusted by astronomy enthusiasts worldwide
"This app is simply fantastic and keeps getting better. It offers a huge variety of features, making it the most professional app in the Play Store."
"A fantastic update. I have always found this app excellent, and now it is even better."
"Version 4 is amazing: intelligently programmed, very well organized. Thank you for this excellent work!"
"Along with Stellarium and SkySafari, this is one of the best astronomy programs!"
Latest updates and improvements
Start with the free Sky View or get the complete observatory experience.