Mobile Observatory Astronomy

Wolfgang Zima

In-app purchases

About this app

Mobile Observatory: Your Ultimate Sky-Watching Companion

Discover celestial wonders from your exact location with the most comprehensive astronomy app on Google Play. Whether you're a casual stargazer or a passionate amateur astronomer, Mobile Observatory transforms your device into a powerful astronomical toolkit.

🌄 Real Topographic Horizon - A First for Astronomy Apps
Mobile Observatory is the only astronomy app that shows your real local horizon using topographic elevation data. See the actual profile of hills, mountains, and ridges around you - know exactly where your sky view begins.

🌌 Aurora & Solar Activity Alerts
Never miss the Northern Lights again! Get push notifications when aurora activity increases at your location. Stay informed about solar flares and geomagnetic storms that could bring spectacular aurora displays to your area.

✨ Stunning Sky Visualization
Experience the most realistic sky rendering on Android. Our physically accurate atmospheric scattering simulation shows the sky as it truly appears - from deep twilight colors to the subtle glow of the Milky Way. Only the real sky is more beautiful.

Features:
- Live, zoomable sky map with augmented reality camera view
- 45,000 stars (+ optional 2.5 million star catalog download)
- Photorealistic day and night sky with correctly illuminated landscape
- 3D Solar System view with VR/Cardboard support
- Earth map showing day, night, and twilight zones

Comprehensive Object Catalogs:
- 2,500+ NGC objects, complete Messier, Caldwell & Hidden Treasures catalogs
- 60,000+ minor planets with daily orbital updates
- 1,000+ comets with daily updates
- Artificial satellites including ISS and all Starlink satellites

Planning & Notifications:
- Daily celestial event notifications
- Calendar integration with reminder alarms
- Rise, set, and transit times for any object
- Automatically generated visibility reports
- Twilight times and day length calculations

Solar & Lunar:
- Current Sun imagery and sunspot data
- Solar flare monitoring and alerts
- Moon phases and apparent planetary views
- Lunar and solar eclipse predictions
- Lunar librations and orbital data

Additional Features:
- Light pollution simulation
- Meteor shower forecasts with peak times
- Conjunction dates for planets and Moon
- Home screen widgets
- Accurate calculations for 1900-2100

Ratings and reviews

Very good, complete and capable astronomy app. My only two minor niggles are the on-screen controls are at times a bit small for a phone screen and there's no way to turn off diurnal motion, which means the chart drifts when zoomed in. But that's about it. However there's been no update (as far as I can tell) in 2+ years. Is the developer still active?

Incredible features & a large amount of data. I took an astronomy class in school and this app has info I never learned about. The sheer volume of information may be a little overwhelming at first, but it's organized into categories & there are lots of help boxes with explanations of terms (like 'mv') so that it should become second nature quickly. As a (very) amateur astronomer, this has more than everything I need with room to grow. I almost never pay for apps, but I'm glad I paid for this!

Unusable. In order to show the sky "realistically" many of the brightest object will flair / glare / etc the view out, making it unusable. You can control the glare / flair of the sun and the moon but not the stars. I have checked every single "settings" menu / setting. no go. I want it to look like the screenshots on this listing! Some features are still good.

What’s new

🚀 Version 4.1.1

🛠️ Bug fixes and stability improvements