Planispheric astrolabe

Science and the Art of the Islamic World Dated a.h. 1065 / a.d. 1654–55 Maker: Muhammad Zaman al-Munajjim al-Asturlabi (active 1643–89) Iran, Mashhad The astrolabe is a very ancient astronomical computer for solving problems relating to time and the position of the Sun and stars in the sky.

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