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About this app

Can we tell the time from the stars? Or the date from the Sun's position in the sky?

Come with us BEHIND THE STARS and you'll see how – on your own or in a group.

Four astronomical instruments await you on this journey. They come from one of the oldest museums in the world: the Mathematisch-Physikalischer Salon in Dresden, Germany.

You'll learn how to use these historical instruments (a nocturnal, a sundial, a celestial globe, and an astrolabe) and be able to apply them in the real sky — right now, wherever you are. You can make use of 20 guided units or set out on your own in the new Exploration Mode. While you're exploring, you'll also come to see how the movements of the heavens arise: of the Sun, the Moon, and the stars.
Updated on
Sep 13, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What's new

We’ve improved the pathfinding in the Workshop Mode and added tutorials for those setting up a room or using the app. FAQ have also been added.