Celestia
Celestia is a free, open-source science and GIS app for Windows, macOS and Linux. Real-time 3D visualization of space. It has 2,370 GitHub stars and is released under the GPL-2.0 license. Its source code is on GitHub at CelestiaProject/Celestia.
- Official
- Linux
- macOS
- Windows
- Science, GIS & engineering
- Actively maintained
About Celestia
A real-time space simulation that lets you experience our universe in three dimensions. Copyright 2001-2023, Celestia Development Team Celestia website: Celestia Wikibook: Celestia forums: Celestia Subreddit: Celestia Archive Repository: ## License
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What is Celestia?
Celestia is a free, open-source science and GIS app for Windows, macOS and Linux. Real-time 3D visualization of space. It has 2,370 GitHub stars and is released under the GPL-2.0 license. Its source code is on GitHub at CelestiaProject/Celestia.
Is Celestia free and open source?
Yes. Celestia's source code is public on GitHub under the GPL-2.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Celestia?
Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: 1.6.4) or the project website.
Is Celestia still maintained?
The repository's most recent commit was on Oct 7, 2026. appsgit only lists apps whose repository had a commit in the last six months.