Celestia's source code is freely available on SourceForge. Only official Celestia developers can upload modified code to the SourceForge server, but anyone can download the code and modify it for their own purposes. If you would like to contribute code to the project, please discuss it on the Celestia Web Forum in its Development Forum.
The following pages describe how to obtain the code and modify it for specific operating systems.
- Windows Vista
- Windows XP 32bit & Win7 64bit
A sociological comment:
- As with most software projects with established developer communities and protocols, a potential contributor to Celestia will have to undergo a form of apprenticeship. The program is large and complex and its underlying design philosophy has to be understood. It also takes a while to gain the trust of the people currently working on the program. By themselves, programming skills aren't enough. Too often individuals unfamiliar with the program or with the people involved have suggested significant changes and have become discouraged because their ideas weren't incorporated immediately. Don't let this happen to you. Read the forum. Read the developers mailing list. Participate in discussions. Contribute ideas. Try out things with the code on your own. Be patient. It'll take a while.