The Planetarium currently exists for Windows and as a web app. The native Windows app is smoother and has a few features missing in the web app (e.g., mouse-over identification of individual asteroids). Still, the Web App can show 70000+ asteroids in their individual orbits, and that’s not bad…
We would like to distribute the Planetarium for macOS too, but need your help to do so. If you have a Mac and want to help, please let us know in our Forum.
The Planetarium is in “beta” development. We greatly value your feedback so we can improve it. And please support us at our Sponsor’s Page!
I, Voyager is designed to be improved by the community or used as a platform for new projects. See About for information.
New! v0.2 released on August 2, 2026. More graphic improvements! Better stars, better shadows … and shadows now work in the web app.
Windows
Download links:
- Planetarium-v0.2
- Planetarium-v0.2-debug – Runs from a console window that prints debug text.
- (Or download from releases here.)
Note: You may see a “Windows protected your PC” warning on first use. To run the app, click “More info” and then “Run anyway”. We don’t have a digital certificate at this time (these cost hundreds of dollars!). If you don’t feel comfortable with that, use the web app below instead.
Web App
Link:
- Web-Planetarium-v0.2 – Requires desktop or pretty good laptop. Be aware, the link will start a large download…
We would like to support mobile devices in the future. If you want to help with that, please let us know in our Forum.
You can install the Web-Planetarium from the web page. Look for the install icon in your URL bar. Or just bookmark it. Revisits should be faster on second or third visit due to browser caching.
We’ll continue to maintain the web app as long as bandwidth doesn’t cost too much. We’re hopeful that support at at our Sponsor’s Page will be able to cover this in the future.