Thābit ibn Qurra( 826 - February 18, 901 )
Al-Ṣābiʾ Thābit ibn Qurra al-Ḥarrānī was an Arab Sabian mathematician, physician, astronomer, and translator who lived in Baghdad in the second half of the ninth century during the time of Abbasid Caliphate.
Ibn Qurra made important discoveries in algebra, geometry, and astronomy. In astronomy, Thabit is considered one of the first reformers of the Ptolemaic system, and in mechanics he was a founder of statics.
Thabit was born in Harran in Assyria . The city of Harran was never fully Christianized, unlike the rest of Assyria. By the early Arabic era, the people of Harran were still adhering to the cult of Sin. Thabit and his pupils lived in the midst of the most intellectually vibrant, and probably the largest, city of the time, Baghdad. He occupied himself with mathematics,...