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How to Locate Jupiter and Its Four Galilean Moons

Last updated: March 2025

This page explains what we keep when you use the site or write to us, why we keep it, and what you can ask us to do with it.

Observatory Equipment

When you send a message or ask about a commission, we keep what you have typed: your name, your email address and the details of your request.

The site also records ordinary technical information, such as the type of browser used and the pages opened, so we can tell what is slow or broken.

Planetary Conjunctions

Tracking Asteroid Movements

Observation notes and correspondence are kept while you're actively engaged with us, and for a reasonable time afterward. Records tied to specific viewing sessions or equipment purchases are retained longer, as we may need to reference them for support or warranty purposes.

Lunar Eclipse Timing

We do not sell your personal information. It is shared only with the services that help us operate this site, and only the information they need to do their job.

Measuring Star Brightness

Access to your information is limited to those who need it, and any data sent through this site travels over an encrypted connection.

Refractor Mirrors

You can request to see what information we hold about you, to correct it, or to have it removed. Write to us and we will confirm once the change is complete.

Night Sky

This site uses a small number of cookies to function properly. Details about which ones and how to disable them are explained separately.

Cookie Policy

Building Your First Observatory

If we change anything here, we'll update this page and mark the date at the top.

Moon Phases

Have questions? Use our contact form and we'll give you a straight answer.