A Princely Pandect on Astronomy

This book presents an English-language translation of Risālā-yi MuÊ¿Ä«nÄ«ya, or the MuÊ¿Ä«nÄ«ya Epistle. Risālā-yi MuÊ¿Ä«nÄ«ya is one of the earliest known works of Naṣīr al-DÄ«n ṬūsÄ« (1201–1274), an intellectual luminary of the 13th century CE. The work is notable for the choice of TÌ£ūsī’s native Persian as the language of the text. In addition, TÌ£ūsÄ« organized his volume into a four-part structure, which went on to become a popular template for the Islamic astronomers who succeeded him.   This book helped ensure the patronage of TÌ£ūsÄ«'s courtly patrons during his decades-long stay with the IsmaÊ¿Ä«lÄ«s, as well as the continuation of his remarkable career under the first Ilkhanid rulers of Persia. This translation helps make this notable treatise accessible to English language readers. It is among a handful of English translations of major astronomical works dealing with hay’a/cosmography in the Islamic world.  Subsequently TÌ£ūsÄ« was to pen his own commentary on the work (the Ḥall-i Mushkilāt-i MuÊ¿Ä«nÄ«ya, or A solution to the difficulties of the MuÊ¿Ä«nÄ«ya) and he used this occasion to discuss his celebrated mathematical formulation “the TÌ£ūsÄ« Couple” (a concept that he merely hinted at in the Risālā-yi MuÊ¿Ä«nÄ«ya). 

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