Bīrūnī's Examination of the Path of the Centre of the Epicycle in Ptolemy's Lunar Model

@article{Mozaffari2014BrnsEO,
  title={Bīrūnī's Examination of the Path of the Centre of the Epicycle in Ptolemy's Lunar Model},
  author={Sahar Mozaffari},
  journal={Journal for the History of Astronomy},
  year={2014},
  volume={45},
  pages={123 - 127}
}
  • S. Mozaffari
  • Published 2014
  • Physics
  • Journal for the History of Astronomy
Ptolemy's complete lunar model in Almagest V produces a large variation of distance of the centre of the epicycle, between its maximum at mean conjunction and opposition to the mean position of the Sun and its minimum at mean quadrature, so that the resulting path of the centre of the epicycle about the Earth is an oval figure. In Figure 1, with the Earth at T, the centre of the epicycle L moves uniformly about T on an eccentric of radius R with centre E and apogee A, through the mean… Expand

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