ابن الشاطر
Mathematical techniques developed in the 13th to 14th centuries by the Arab and Persian astronomers Mo'ayyeduddin al-Urdi, Nasir al-Din al-Tusi, and Ibn al-Shatir (died circa 1375) for geocentric models of planetary motions closely resemble some of the techniques used later by Copernicus in his heliocentric models.