The Planetary Theory of Ibn al-Shāṭir

@article{Kennedy1959ThePT,
  title={The Planetary Theory of Ibn al-Shāṭir},
  author={Edward S. Kennedy and Victor Roberts},
  journal={Isis},
  year={1959},
  volume={50},
  pages={227 - 235}
}
A recent paper' has discussed the solar and lunar kinematic models described by the fourteenth-century Damascene astronomer known as Ibn al-Sht the planet is at the terminal point of the last. Thus Ibn al-Shatir abandoned the eccentric orbits and the equants which so strongly characterize the work of Ptolemy. For all the outer planets and Venus the number of component vectors is the same, and the models differ only in the lengths and angular velocities of the components. It is therefore… 
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References

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who revised Al-Khwarizml's z-j
    Urdl, like Ibn al-Shatir a Damascene; one of Na$lr al-Din's assistants at Maragha. 6. Qutb al-Din al-Shirazi (387), a student of Na$lr al-Din
      Ibn al-Haitham (204) best known for his optics, but who wrote also on astronomy