Nasir al-Din al-Tusi was an extraordinary 13th-century Persian polymath, astronomer, and philosopher whose immense contributions advanced the Golden Age of Islamic science. Working under Mongol patronage at the famous Maragheh Observatory, he developed the "Tusi couple," an innovative geometrical model that significantly improved planetary tracking and later influenced Copernicus. An incredibly prolific writer, al-Tusi also established trigonometry as an independent mathematical discipline and wrote extensively on ethics, theology, and physics, making him one of the most versatile scholars of the medieval world.

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