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Al Battani worked in Syria, at ar-Raqqah and at Damascus, where he died. He was able to correct some of Ptolemy's results and compiled new tables of the Sun and Moon, long accepted as authoritative, discovered the movement of the Sun's apogee, treats the division of the celestial sphere, and introduces, probably independently of the 5th century indiaThe Republic of India is a large multicultural country in South Asia, with a population of over one billion. The Indian economy is the fourth largest in the world, in terms of purchasing power parity, and is the world's second-fastest growing economy.n astronomer Aryabhatta, the use of sines in calculation, and partially that of tangentIn mathematics, the word tangent has two distinct, but etymologically related meanings: one in geometry, and one in trigonometry. Geometry In plane geometry, a straight line is tangent to a curve, at some point, if both line and curve pass through the pois, forming the basis of modern trigonometry. He also calculated the values for the precessionPrecession (also called gyroscopic precession is the phenomenon by which the axis of a spinning object (e. a part of a gyroscope) "wobbles" when a torque is applied to it. The phenomenon is commonly seen in a spinning toy top, but all rotating objects can of the equinoxes (54.5" per year) and the inclination of Earth's axis (23° 35').
His most important work is the Kitāb az-Zij ('the book of tables') with 57 chapters, which by way of latin translation as De Motu Stellarum by Plato Tiburensis in 1116Events Baldwin I of Jerusalem undertakes an invasion of Egypt The modern book of separate pages stitched together is invented in China Construction starts on the Chennkesava temple The Aztecs leave Aztlan searching for the site of what will eventually bec (printed 1537Events January 6 Alessandro de Medici assassinated August 25 The Honourable Artillery Company, the oldest surviving regiment in the British Army, and the second most senior, was formed. Pope Paul III publishes the encyclical Sublimis Deus, which declares by Melanchthon, annotated by Regiomontanus), had great influence on European astronomy. A reprint appeared at Bologna in 1645. Plato's original manuscript is preserved at the Vatican; and the Escorial Library possesses in manuscript a treatise by Al Battani on astronomical chronology.