This Medieval Astrolabe Turns 1,000 Years Old A rare astronomical instrument made in medieval Spain has reached an extraordinary milestone. Now held by National Museums Scotland, the astrolabe offers a glimpse into the scientific knowledge of the Islamic world during the eleventh century. https://www.medievalists.net/2026/08/this-medieval-astrolabe-turns-1000-years-old/ On the Origin of Clockwork, Perpetual Motion Devices, and the Compass by Price at PG: https://www.gutenberg.org/ebooks/30001 #books #science #horology