Mobile Observatory Astronomy

Wolfgang Zima

About this app

Mobile Observatory 3 Pro: your ultimate sky-watching companion. Discover the celestial wonders from your location with the most comprehensive astronomy app available on Google Play Store. Whether you're a casual sky-gazer or a passionate amateur astronomer, this app is a must-have.

With a live, zoomable sky map, you'll know exactly what sky object you're looking at, and you'll have access to loads of detailed information on stars, planets, deep sky objects, meteor showers, comets, asteroids, lunar and solar eclipses, and more. The app offers a photorealistic display of the night and day sky, with a 3D view of the Solar System. You can also get notifications of current celestial events, push events to your phone's calendar, and set reminders.

With an intuitive interface and loads of widgets, Mobile Observatory 3 Pro is the only app you need to stay up-to-date on all things astronomy.

- 45000 stars plus optionally 2.5 mio stars for download
- Photorealistic display of the night and day sky with correctly illuminated landscape. Its the only app on Android which renders the sky physically correct, taking into account atmospheric scattering. Only the real sky is more beautiful...
- Augumented sky view using your device's camera
- 3D-view of the Solar System
- Cardboard viewing of the night sky or the Solar System in 3D
- Map of the Earth showing day and night
- Lots of great widgets for your home screen
- Daily notifications of current celestial events
- More than 60000 Minor Planets with daily updates of orbital parameters
- More than 1000 Comets with daily updates
- Artificial Satellites including the International Space Station (ISS) and all Starlink satellites
- Live mode (point device on sky and get information on what you see)
- Calendar showing detailed descriptions of celestial events
- Push celestial events to your phone's calendar and set a reminder alarm
- Rise, set, and transit times for any object
- Position of any object in the sky (altitude and direction)
- Twilight times, length of day
- 2500 selected NGC objects (galaxies, clusters, ...)
- Messier Catalog (110 objects) complete with images
- Caldwell Catalog (110 objects) complete with images
- Hidden Treasures Catalog (109 objects) complete with images
- Meteor streams (begin, maximum, hourly rate, ...)
- Lunar and solar eclipses information
- Lunar librations, ascending node, maximum declination
- Moon phases, the apparent view of the sun and planets
- Current image of the Sun and sunspot number
- Automatically generated visibility report for any object
- Simulation of light pollution
- Intuitive User Interface: quickly find what you are looking for
- Widget with rise & set times of the Sun and Moon
- Detailed ephemeris, visibility information of all objects
- Dates of conjunctions between any object with planets or the Moon
- Accurate calculations for dates between 1900 and 2100

Ratings and reviews

Been using this app from day one and it is still one of my favourite apps. Beautiful interface and excellent info on objects. More than happy to upgrade and reward the author for their hard work and the additional features added. If you are looking for a comprehensive planetarium app then this is the one. The only additional feature that would be handy is a configurable box to simulate a camera field of view.

Highly detailed astronomy app. I've been using Mobile Observatory for years on several devices. There is a large amount of information to hand in various views and panels for the sky, objects and events. The sky view is lovely and can be customised to be realistic for your location. Event notifications are very useful. The only things it doesn't do are lists and telescope interface. Dev Wolfgang has been responsive to queries and suggestions!

Very well designed and rich in functionality app. Worth going for the pro version. I have had it for years on many devices and it has been frequently updated. The graphics are excellent, the live view, information on objects, organisation of databases etc are all excellent. Much better than apps from big software houses!

What's new

Corrected links to images of the Sun
Fixed crash when accessing the menu in Sky View
Corrected position of the constellation lines