Your location stays on your device. The tools need a place to compute rise times, planets and eclipses. By default the site guesses a city from the time zone of your device, without asking anything. If you choose a city or share your position, the coordinates are used by the calculation in your browser and saved in its local storage so that the next page remembers them. They are never sent to our server.
What is saved in your browser. The place you chose, the theme (night, paper or red light) and the hemisphere used to draw the Moon. You can erase them at any time by clearing the site data in your browser settings.
Audience measurement. The site does not measure its audience yet. When it does, it will use Google Analytics 4 with advertising signals turned off. In Europe it will run without cookies and only count anonymous visits; elsewhere it will use analytics cookies. This page will be updated before the measurement starts.
Hosting. The pages are served by Cloudflare, which keeps technical logs (IP address, date, page requested) for a short time to protect the service against attacks.
Contact. For any question about your data, write to the address shown on the About page.
Updated November 11, 2026