History of Science Museum: Collection Database Search

Narratives

Label - Islamic universal astrolabes

Both the astrolabes shown here use the 'universal lamina' described by Islamic mathematicians in 11th-century Toledo. A standard astrolabe uses a vertical stereographic projection of the celestial sphere. These instruments are also stereographic but use a horizontal projection. [2] has the additional feature of a special form of rete rotating above the universal projection.

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