Ali Qushji

Ali ibn Muhammad Qushji was born around 1403 CE in Samarkand, the magnificent Timurid capital of Central Asia, where his father served as the royal falconer to the sultan Ulugh Beg — a circumstance that gave Ali early access to the sultan's famous observatory and court. The surname Qushji itself derives from the Turkish word for falconer. Growing up in proximity to one of the greatest astronomical patrons in history, Ali was educated directly under Ulugh Beg and emerged as one of the observatory's most brilliant mathematicians and astronomers.

After Ulugh Beg's assassination in 1449 CE, Ali Qushji left Samarkand and undertook extensive travels through Persia and the Arab lands, eventually settling in Tabriz under the Aq Qoyunlu dynasty. His most historically significant journey came when the Ottoman sultan Mehmed II — fresh from his conquest of Constantinople in 1453 — invited distinguished scholars to Istanbul. Ali Qushji accepted and journeyed to the new Ottoman capital, where he was received with great honor and appointed professor at the newly founded Hagia Sophia madrasa.

In Istanbul, Ali Qushji made bold theoretical contributions. Most notably, he argued that astronomy could be pursued as an independent mathematical science without relying on Aristotelian physics — a radical position that foreshadowed the methodological revolution of the Copernican era. He also proposed that the Earth might move, though he did not fully commit to a heliocentric model.

Ali Qushji revised and completed Ulugh Beg's celebrated zij (astronomical tables) and wrote important treatises on arithmetic and astronomy. He died in Istanbul in 1474 CE, leaving behind a transformed Ottoman scientific culture and a generation of scholars trained in rigorous mathematical astronomy.