Muḥammad ibn Jābir ibn Sinān al-Ḥarrānī al-Raqqī al-Ṣābiʾ, Abū ʿAbd Allāh al-maʿrūf bi-l-Battānī (al-mutawaffā: 317 AH)

Ibn Jabir Battani was an astronomer and mathematician who made significant contributions to the fields of astronomy and trigonometry. He is best known for his work on the calculation of the solar year and his corrections to the Ptolemaic model. His most famous work, 'Kitab az-Zij', was a comprehensive treatise on astronomy that included detailed tables for the movements of the sun, moon, and planets. His work on trigonometry included defining the trigonometric ratios and compiling tables of sine...See more