The letters in this volume cover Poincaré's multifaceted career in astronomy in its entirety, extending from the time of his first publications in 1880 to the end of his life in 1912. At a tender age, Poincaré established his authority in questions of celestial mechanics, and his views were soon sought after on a vast array of questions by the leading astronomers and geodesists of his time, i…
This book provides the only critical edition and English translation of Maḥmūd al-Jaghmīnī’s al-Mulakhkhaṣ fī al-hayʾa al-basīṭa, the most widely circulated Arabic treatise on Ptolemaic astronomy ever written. Composed in the early 13th century, this introductory textbook played a crucial role in the teaching, dissemination, and institutional instruction of Islamic astronomy well …