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az-Zarqallu

Spanish astronomer

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development of astrolobe

  • Babylonian mathematical tablet
    In mathematics: Islamic mathematics to the 15th century

    …the Spanish Muslim astronomer al-Zarqallu invented a single plate that worked for all latitudes. Slightly earlier, astronomers in the East had experimented with plane projections of the sphere, and al-Bīrūnī invented such a projection that could be used to produce a map of a hemisphere. The culminating masterpiece was…

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