This clock represents the pinnacle of achievement in horology for the late 17C. How Thomas Tompion who made it acquired his outstanding scientific and technical skills is not known. The 'face' has ...

While it’s nowhere near as complicated an instrument, this astrolabe puts us in the mood to watch the entire Clickspring clock build again. And [Chris] is working on his own ancient instrument ...

The astrolabe was a mathematical instrument which was used to carry out astronomical measurements, to calculate the positions of the sun and the stars, and to tell the time. This one was made in ...