Hemisferium Planisferic Astrolabe LHV 10 ∅This Planisferic (Catholic or European) Astrolabe is set for 50 latitude. Astrolabe, from the Greek, star searcher, was introduced to Europe by the Arabs in the early 12th century. It became a vital tool for astronomers, astrologers, and surveyors. This astronomical computer was used to estimate the time, to measure heights of celestial bodies and geographical accidents, determine the local latitude, estimate the sunrise and sunset time and to draw