Celestia
Celestia is a free, open-source education app for Android. 3D interactive planetarium. It has 217 GitHub stars and is released under the GPL-2.0-or-later license, and you can install it from F-Droid and Google Play.
github.com/celestiamobile/AndroidCelestia (opens in a new tab)
- Android
- Kotlin
- Education & language
- Actively maintained
About Celestia
Celestia — real-time 3D visualization of space Note: this is an unofficial version of Celestia. It may be slow to update or miss some features. 3D Space Simulator | Celestia lets you explore our universe in three dimensions. Celestia simulates many different types of celestial objects. From planets and moons to star clusters and galaxies, you can visit every object in the expandable database and view it from any point in space and time. The position and movement of solar system objects is calculated accurately in real time at any rate desired. Interactive Planetarium | Celestia serves as a planetarium – for an observer on any celestial object.
Privacy and F-Droid
F-Droid builds Celestia from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
- Relies on a non-free network service
Screenshots
Screenshots from the app's F-Droid listing.
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What is Celestia?
Celestia is a free, open-source education app for Android. 3D interactive planetarium. It has 217 GitHub stars and is released under the GPL-2.0-or-later license, and you can install it from F-Droid and Google Play.
Is Celestia free and open source?
Yes. Celestia's source code is public on GitHub under the GPL-2.0-or-later license, which is OSI-approved or FSF-free. F-Droid flags these anti-features on its latest build: relies on a non-free network service.
How do I install Celestia?
You can install Celestia from F-Droid (package space.celestia.mobilecelestia) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: 26_9_0_rc1).
Is Celestia still maintained?
The repository's most recent commit was on Oct 7, 2026. Its F-Droid listing was last updated on Sep 20, 2026. appsgit only lists apps whose repository had a commit in the last six months.