A helper tool for recognizing stars and constellations

Easy to use

You turn a wheel to put your time next to your date, and instantly, there's a map of the stars and constellations that are above your horizon for that moment.


You can use this tool for wide range of latitudes. For equatorial areas, the map view is split into two flippable parts representing north and south hemispheres.


You can export a printable version. Individal components needs to be cut, assembled and glued together. Both the wheel and envelope need to be joined together with a pin.


The Java source code with SVG templates are located on GitHub together with additional instructions. Just alter the code or tweak the output appearance as you like.


All texts in the application can be localized. If your language is not available yet, feel free to join the Transifex project and help to create a new language pair.