Moorish planispheric astrolabe, c 1150.
4 0 c m
actual image size: 25cm x 32cm

Moorish planispheric astrolabe, c 1150.

© Science Museum / Science & Society Picture Library


This bras Islamic astrolabe originates in the region of North Africa known as the Maghrib. An astrolabe is in esence a model of the universe that an astronomer could hold in their hands. From its origins in the Ancient World, Islamic astronomers developed the astrolabe and its use spread. Popular in Medieval and Renaisance Europe, its many uses included timekeeping, astrology and surveying. The two-dimensional depiction of the heavens used on this instrument is achieved using the mathematical technique of stereographic projection. This front view shows the moveable fretwork plate called the 'rete', complete with silver studs, which denotes the positions of the stars by short curved pointers.

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