"Some of the al-Tusi material is known to have reached Rome in the 15th century... but there is no evidence that Copernicus ever saw it.…I personally believe he could have invented the method independently."

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People from Tus, IranScientists who worked on qibla determinationIranian Shia scholars of Islam13th-century Iranian astronomers13th-century Iranian mathematicians
Original Language: English

Sources

Owen Gingerich, “Islamic astronomy”, http://faculty.kfupm.edu.sa/phys/alshukri/PHYS215/Islamic_astronomy.htm (accessed 1 March 2009). quoted in Is Science Western in Origin? C K Raju