Bursalı Kadızade Rumi

Qāḍī Zāda al-Rūmī, whose actual name was Salah al-Din Musa Pasha, was born in 1364 in Bursa, Ottoman Empire, and died in 1436 in Samarqand, Timurid Empire. The name Qāḍī Zāda means "son of the judge," and al-Rūmī indicates he came from Asia Minor. He was a Turkish astronomer and mathematician who worked at the observatory in Samarkand. He is credited with computing the sine of 1 degree to an accuracy of 10−12. Alongside Ulugh Beg and al-Kāshī, he contributed to the Zij-i Sultani, a significant stellar catalogue containing the positions of 992 stars, which was the first comprehensive catalogue of its kind since the Maragheh observatory's Zij-i Ilkhani two centuries prior.