from the contrasting brass and steel parts to the choice of complex Arabic script for the markings. [Uri] has another video that goes over astrolabe basics and his design process that’s well wor ...

Islamic planispheric astrolabe in brass, diameter 25 cm, with rete, two plates, alidade, alidade, pin and horse, made by Jamal al-Din ibn Muquin, at Lahore, Pakistan, in 1077 AH (= 1666-7 CE). Inside ...

But the astrolabe I'm holding is, in fact, a Jewish one. It was made about 750 years ago, in Spain. It's inscribed in Hebrew lettering, but it contains Arabic and Spanish words, and it combines ...