Celestia
Celestia is a free, open-source science and GIS app for Windows, macOS and Linux. Real-time 3D visualization of space. It has 2,386 GitHub stars and is released under the GPL-2.0 license. Its source code is on GitHub at CelestiaProject/Celestia.
github.com/CelestiaProject/Celestia (opens in a new tab)
Data as of from the GitHub API; description from the project's repository. Report an error
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
Similar apps
More open-source GIS and science apps
Gqrx
gqrx-sdr/gqrx
Software defined radio receiver powered by GNU Radio and Qt.
Maintained · last commit Oct 27, 2026
Science, GIS & engineeringWindowsmacOSLinuxRustGIS
opengeos/RustGIS
A fast, free and open-source GIS in pure Rust.
Too new to judge · created Oct 10, 2026
Science, GIS & engineeringWindowsmacOSLinuxCava
karlstav/cava
Cross-platform Audio Visualizer.
Active · last commit Oct 23, 2026
Science, GIS & engineeringWindowsmacOSLinuxNodify
miroiu/nodify
Highly performant and modular controls for node-based editors designed for data-binding and MVVM.
Maintained · last commit Oct 22, 2026
Science, GIS & engineeringWindowsGeoLibre
opengeos/GeoLibre
A lightweight, cloud-native GIS platform for visualizing, exploring, and analyzing geospatial data.
Active · last commit Oct 28, 2026
Science, GIS & engineeringWindowsmacOSLinuxMacro Deck
Macro-Deck-App/Macro-Deck
The open-source macro pad with customizable widgets, powerful integrations and a secure plugin ecosystem.
Active · last commit Oct 27, 2026
OfficialScience, GIS & engineeringWindowsmacOSLinux
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 27, 2026. appsgit only lists apps whose repository had a commit in the last six months.