Al-?abi? Thabit ibn Qurrah al-?arrani (Arabic: ???? ?? ????, Latin: Thebit/Thebith/Tebit; 826 – February 18, 901) was a Sabian mathematician, physician, astronomer, and translator who lived in Baghdad in the second half of the ninth century during the time of Abbasid Caliphate.
Thabit ibn Qurrah 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.