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ALBATEGNIUS (c. 850-929)

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Originally appearing in Volume V01, Page 491 of the 1911 Encyclopedia Britannica.
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ALBATEGNIUS (c. 850-929) , an Arab See also:prince and astronomer, correctly designated Mahommed See also:ben Gebir al Batani, his surname being derived from his native See also:town, Batan in See also:Mesopotamia. From his observations at Aracte and See also:Damascus, where he died, he was able to correct some of See also:Ptolemy's results, previously taken on See also:trust. He compiled new tables of the See also:sun and See also:moon, See also:long accepted as authoritative, discovered the See also:movement of the sun's apogee, and assigned to See also:annual precession the improved value of 550. Perhaps independently of Aryabhatta (See also:born at Pataliputra on the See also:Ganges 476 A.D.), he introduced the use of sines in calculation, and partially that of tangents. His See also:principal See also:work, De Motu Stellarum, was published at See also:Nuremberg in 1537 by See also:Melanchthon, in a blundering Latin See also:translation by See also:Plato Tiburtinus (fl. 1116), annotated by See also:Regiomontanus. A reprint appeared at See also:Bologna in 1645. The See also:original MS. is preserved at the Vatican; and the See also:Escorial library possesses in MS. a See also:treatise of some value by him on astronomicalchronology. Albategnius takes the highest See also:rank among Arab astronomers. See Houzeau, Bibliographic astronomique, i. 467; M.

See also:

Marie, Histoire See also:des sciences, ii. 113; R. See also:Wolf, Geschichte der Astronomie; p. 67; See also:Delambre, Hist. de l'astr. au moyen See also:age, ch. ii.; Phil. Trans., 1693 (913), where E. See also:Halley supplies corrections to some of the observations recorded in De Motu Stellarum.

End of Article: ALBATEGNIUS (c. 850-929)

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