Legal
Privacy statement
Celestium is designed to work without collecting data. This statement describes what does and does not happen, both in the program and on this website.
The program collects no data
Celestium sends no usage data, telemetry or chart data to us or to anyone else. No account is needed to use the program.
All charts, people, folders and notes are stored in a file on your own machine: on Windows in Documents\Celestium, on macOS in ~/Documents/Celestium. We have no access to it.
The ephemeris data and the place database ship inside the program. Looking up a birthplace happens locally and does not travel over the internet.
Map material
The Astrocartography and Local Space screens in Celestium Pro display a world map. That map material is fetched from OpenStreetMap, which means OpenStreetMap can see which part of the map you are requesting and from which IP address. No chart data is sent with it.
If you do not use those two screens, Celestium makes no connection to OpenStreetMap.
This website
This website sets no cookies and uses no trackers. Fonts are served from this site itself rather than from an external service, so your visit is not disclosed to third parties.
The site is hosted by Cloudflare. As with any web server, connection data is briefly processed to deliver the site and protect it against abuse.
Contacting us by email
If you send us a message, we keep that message and your email address for as long as is needed to answer your question and to handle any later questions about the same matter.
Your rights
You have the right to ask what data we hold about you, to have it corrected or erased, and to object to its processing. Because the program itself collects nothing, in practice this concerns your email correspondence and your licence details.
Get in touch at info@celestium.nl. You also have the right to lodge a complaint with your national data protection authority.
Details
- [TODO_LEGAL_ENTITY_NAME]
- [TODO_REGISTERED_ADDRESS]
- info@celestium.nl
- Chamber of Commerce: [TODO_KVK]
- VAT number: [TODO_VAT]
Last updated: 19 September 2026