Achmed Ibn Ketir [Alfraganus] (? - ca. 840)
also known as: Alfragan, Alfergan, Alfragan, Alfraganus, Achmed Ibn Ketir, al-Farghani [al Fargani], Muhammed Ebn Ketir

Alfraganus was born in Fergana in the 10. century and worked as Astronomer for the Kalif Al-Mamun. He wrote an introduction to Astronomy which was republished in Latin six times between 1493 and 1669, it contained 30 chapters. Other works covered sundials and the usage of astrolabes.

Reference(s):
Illustr. Lexikon der Astronomie, by Adolph Drechsler, Verlag J.J. Weber, Leipzig 1881, p. 7

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