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+#REDIRECT [[Al-Battani]]
-'''Al-Batani''', also know as'''Albategnius''' (c. 850--929), was an Arab prince and [[astronomer]]. His full name is ''Abu Abdallah
-Mohammad ibn Jabir ibn Sinan al-Raqqi al-Harrani al-Sabi al-Battani'', hence the usual shortening. His name derives from his native town, Batan in [[Mesopotamia]].
-From his observations at [[Aracte]] and [[Damascus]], where he died, he was able to correct some of [[Ptolemy]]'s results, previously taken on trust. He compiled new tables of the [[Sun]] and [[Moon]], long accepted as authoritative, discovered the movement of the sun's apogee, and assigned to annual precession the improved value of 55" Perhaps independently of Aryabhatta (born at [[Pataliputra]] on the [[Ganges]] 476 A.D.), he introduced the use of sines in calculation, and partially that of tangents.
-His principal work, ''De Motu Stellarum,'' was published at [[Nuremberg]] in 1537 by [[Melanchthon]], in a blundering Latin translation by [[Plato Tiburtinus]], annotated by [[Regiomontanus]]. A reprint appeared at [[Bologna]] in 1645. The original manuscript is preserved at the [[Vatican]]; and the [[Escorial Library]] possesses in manuscript a treatise of some value by him on astronomical chronology. Albategnius takes the highest rank among Arab astronomers.