Celestia Desktop is a free 3D space simulation program that lets you explore the universe in real time, traveling seamlessly between planets, stars, and galaxies to observe their orbits and motion.

To explore the code, modify the application, or run it locally, download the complete script bundle. This ZIP file includes all the files required to run the project on your own system.

After downloading, extract the ZIP and move its contents to Celestia’s extras folder:

• Windows: C:\Program Files\Celestia\extras\
• Ubuntu: /usr/share/celestia/extras/
• macOS: Applications/Celestia.app/Contents/Resources/CelestiaResources/extras-standard/

After copying the files, you can run the demo from Celestia by pressing File > Open Script... and selecting either koi_candidates.cel or toi_candidates.cel from the extras/Scripts/ folder.