Epact Scientific Instruments of Medieval and Renaissance Europe

A noteworthy feature of this astrolabe is the inclusion on the rete of some unusual stars such as those in the Belt of Orion and in the Plough (Ursa Major). According to the star names the latter constellation is pictured as a four-wheeled cart that is drawn by three horses.

Museum Boerhaave, Leiden
Inventory no. 3102

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