The Almagest of Ptolemy was authoritative in astronomy for centuries. by. . 38r and 38v) show the Ethiopian king of Greek mythology in fifteenth-century Timurid garb and with the facial features of Ulugh Beg, his fine beard rendered. Ulugh Beg. Numerous manuscripts of. from all Persian manuscripts existing in Great Britain, with a vocabulary of Persian and Arabic words. SKU: ; Ulugh Beg – his Book of the fixed Stars by Al-Sufi. Ulugh Beg's catalogue of stars: Rev.