Mobile Observatory Free - Astronomy

Contains ads
4.4
7.48K reviews
500K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Mobile Observatory Free is the perfect tool for anybody interested in the sky's wonders, from the occasional sky gazer to the passionate amateur astronomer.

If you want the ad-free version, please visit
https://play.google.com/store/apps/details?id=com.zima.mobileobservatorypro

Do you want to know if the next lunar eclipse is visible from your location or when the next bright comet is visible? Would you like to be notified by your smart phone next time, Jupiter and the Moon meet in the sky? Do you want to know what the blazing bright object in the evening sky is? Do you want to be always up-to-date which celestial events that are visible from your location? Then this app is a must-have for you!

Mobile Observatory does not only include a live, zoomable sky map which tells you what sky object you are looking at but provides you with loads of detailed extra information on stars, planets, deep sky objects, meteor showers, asteroids, lunar and solar eclipses as well as detailed ephemeris of all included sky objects and an interactive top-down view of the Solar System. All that in just one app!

Mobile Observatory Free is the free version of the successful astronomy app Mobile Observatory Pro, which is available for purchase on Google Play.

The key features of MO Free are as follows:
- Photo-realistic 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...
- 30.000 stars to magnitude 7
- 3D-view of the Solar System
- Automatically created calendar of celestial events
- Map of the Earth showing day and night
- Automatic calculation of interesting celestial events for your location
- Daily notifications of current celestial events
- 1000 minor planets
- All 88 constellations
- Messier and Caldwell catalogs (220 Deep Sky objects)
- ... and much much more...

Mobile Observatory displays the current view of the sky, the times of rise and set of any object, current positions, and apparent views of the planets, twilight times, moon phases, celestial events (such as conjunctions and eclipses), a 3D-view of the Solar System and much more. Use Live Mode to point your device to the sky and find out what you are looking at using the orientation sensors or get daily notifications of celestial events.

Mobile Observatory currently includes data for the Sun, Moon, seven planets + Pluto, a built-in star catalog of more than 30000 stars (to magnitude 7), the Messier catalog (110 objects), and the Caldwell catalog (110 objects). The orientation sensors of your device can be used to use Mobile Observatory as a guide to the sky via Live Mode.
Updated on
May 19, 2021

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available
4.4
7.48K reviews
A Google user
February 22, 2020
Used version 2 for as long as I can remember. Seems like I paid for an upgrade at some point but I can't be certain. Version 3 ads are too intrusive and, because the app uses my location data, I can't be certain of that data not being passed along to the same in app ads. I wanted to try 3 to find out if I would buy the pro version but I guess I'll be sticking with the previous version for now.
15 people found this review helpful
Did you find this helpful?
A Google user
January 20, 2020
Two notifications a day would be perfect. One in the morning for celestial events occurring during daylight hours. And (naturally) another notification towards evening highlighting celestial events occurring during nighttime hours. That seems like an option worth seeing implemented, because of its straight forward logic. How many notifications do you prefer all throughout the day and night? Constantly is as though a harassment. For the time being, I have opted out of that (wonderful) feature.
28 people found this review helpful
Did you find this helpful?
Wolfgang Zima
January 20, 2020
Hi thanks for your suggestion. I'll think about it. Greetings Wolfgang
Ron Loscalzo
September 30, 2020
This is a very very tricky app to learn to use If you don't know how to use it properly it can be extraordinary frustrating. It has tons of features but if you check a box or adjust a setting of which there are very many it will be very frustrating to find objects and then to figure out what setting to go back and reset. You really need to study this and it features and take notes as you make changes to settings so you can go back and unravel any number of frustrating changes
134 people found this review helpful
Did you find this helpful?

What's new

- Several bugs fixed