This delightfully simple instrument is based on an ancient device called a “Cross Staff”. It can measure angles between stars and other celestial objects.
To find out how to make one from basic materials and without too much effort; click the sheets below to download instructions and templates.
Advanced builders who wish to make their own measurer (possibly to a different length), can click the link on the right to open a spreadsheet calculator
.jpg)
-4.jpg)
-5.jpg)
-6.jpg)