"Book of Fixed Stars"

The "Book of Fixed Stars" refers to a notable work by the Islamic astronomer Abd al-Rahman al-Sufi, written in the 10th century. This book is an important astronomical text that catalogs and maps stars and constellations. Al-Sufi’s work expanded upon earlier Greek texts, providing detailed descriptions and illustrations of stars, their positions, and brightness. It significantly influenced later Islamic and European astronomy, offering insights into the night sky that were essential for navigation, timekeeping, and understanding celestial movements. The book highlights the rich scientific knowledge of the Islamic Golden Age and the importance of systematic star observation.