Nasir al-Din al-Tusi's Memoir on Astronomy : Volume I

Tusi (1201-1274 a.d.) was an Arabic scholar whose writings became the standard texts in several disciplines for several centuries. They include editions of Euclid's Elements and Ptolemy's Almagest, as well as other books on mathematics and astronomy, and books on logic, ethics, religion. He wrote the Tadhkira, to be "a summary account of `astronomy' presented in narrative form. The details are expounded and proofs of the validity are furnished in the Almagest. Indeed, ours would not be a complete science if taken in isolation from the Almagest for it is a report of what is established therein." It is thus not only a sort of running commentary on the Almagest, but also an account of medieval Arabic cosmology. Jamil Ragep has not only translated the text of the Tadhkira, but has also provided a lengthy introduction with a biography of Tusi and a discussion of the context in which the Tadhkira was written and its influence, as well as a detailed and thorough commentary on each section of the text.