SalibaG., “The original source of Qutb al-Dīn al-Shīrāzī's planetary model”, Journal for the history of Arabic science [Aleppo], iii (1979), 3–18.
2.
The book is being edited by Prof. RoshdiRashed, CNRS, Paris. A very brief description of 'Urḍī's lunar model was published in Arabic as part of “Falakīy min Dimashq yarudd 'alā hay'at Baṭlamyūs”, Journal for the history of Arabic science, iv (1980), 3–17.
3.
Those interested in the Arabic text will have to wait for the forthcoming full critical edition, which had been scheduled to appear in a publishing house in Beirut, Lebanon, and which has been understandably delayed due to the ongoing civil war in that country. The full English translation and the commentary are now scheduled to appear with the Islamic Texts Society, Cambridge, England, and may indeed appear before the Arabic text, although every effort is being made to reverse the process.
4.
For a full description of this model see Almagest, IV-V, and OttoNeugebauer, A history of ancient mathematical astronomy (New York, 1975), 68–99.
5.
See Almagest, III, 2, 3 for an explicit statement of the principle of uniform motion which is ascribed to the celestial spheres.
6.
In the words of Ibn al-Haytham, imaginary lines have no motions of their own.
