Astrolabe eastern - key ring

This miniature planisferic astrolabe was made after the one made by Diya´al Din Muhammad (Lahore, 1647). It is at the Adler Planetarium & Astronomy Museum, Chicago.The stars on its rete and all other calculus were updated to make it functional. It was set for latitude 22º (Mecca).The most beautiful and sophisticated ancient astronomical instrument to be conceived before the telescope was the astrolabe. It was employed for multiple tasks: from estimating time and measuring heights to drawing horoscopes.This piece can be customized.