Qāḍī Zāda al-Rūmī explained
(1364 in Bursa, Ottoman Empire - 1436 in Samarqand, Timurid Empire), whose actual name was Salah al-Din Musa Pasha ( means "son of the judge", al-rūmī "the Roman" indicating he came from Asia Minor, which was once Roman), was a Turkish astronomer and mathematician who worked at the observatory in Samarkand. He computed sin 1° to an accuracy of 10−12.
Together with Ulugh Beg, al-Kāshī and a few other astronomers, Qāḍī Zāda produced the Zij-i-Sultani, the first comprehensive stellar catalogue since the Maragheh observatory's Zij-i Ilkhani two centuries earlier. The Zij-i Sultani contained the positions of 992 stars.
His works
- Sharh al-Mulakhkhas (Commentary on Jaghmini's compendium on the science of Astronomy)
- Sharh Ashkal al-Ta'sis (Commentary on Samarkandi's Arithmetics)
Further reading
- Book: Adivar, A.. Osmanli Türklarinde Ilim. Istanbul. 1943.
- U.. Ataev. The commentary of Kazi-zade ar-Rumi on the astronomical treatise of Nasir ad-Din at-Tusi. Russian. Questions on the History of Mathematics and Astronomy I. Trudy Samarkand. Gos. Univ. (N.S.) Vyp.. 229. 1972. 124–127.
- Z. A.. Pasaev. The commentary of Kazi-zade ar-Rumi on the astronomical treatise of al-Djagmini (a brief survey). Russian. Questions on Differential Equations, Number Theory, Algebra and Geometry. Trudy Samarkand. Gos. Univ. (N.S.) Vyp.. 202. 1972. 202–204.
- B. A.. Rozenfel'd. A. P. Yushkevich. A. P. Yushkevich . The treatise of Qadi Zada al-Rumi on the determination of the sine of one degree. Russian. Istor.-Mat. Issled.. 13. 1960. 33–538.
- B. A.. Rozenfel'd . A. P. Yushkevich . Notes on a treatise of Qadi Zada al-Rumi. Russian. Istor.-Mat. Issled.. 13. 1960. 552–556.
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