[Tdotu]ūsī and Copernicus: The Earth's Motion in Context

  title={[Tdotu]ūsī and Copernicus: The Earth's Motion in Context},
  author={F. Jamil Ragep},
  journal={Science in Context},
  pages={145 - 163}
  • F. J. Ragep
  • Published 1 June 2001
  • Physics
  • Science in Context
A passage in Copernicus's De Revolutionibus regarding the rotation of the Earth provides evidence that he was aware, whether directly or indirectly, of an Islamic tradition dealing with this problem that goes back to Na[sdotu]īr al-Dīn al-[Tdotu]ūsī (1201–1274). The most striking similarity is the use of comets by both astronomers to discredit Ptolemy's “proofs” in the Almagest that depended upon observational evidence. The manner in which this question was dealt with by Copernicus, as an… 
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