The first Arabic translation of the Almagest was made by order of Harun al-Rashid about the year Boo; others followed, and the Caliph Arah al-Mamun built in 829 a grand observatory at astro- Bagdad.
A steady flow of knowledge from East to West began in the 7th century B.C. A Babylonian sage named Berossus founded a school about 640 B.C. in the island of Cos, and perhaps counted Thales of Miletus (c. 639-548) among his astro- pupils.
That the astro-theological system is also introduced into the epic is clear from the division into twelve tablets, which correspond to the yearly course of the sun, while throughout there are indications that all the adventures of Gilgamesh and Eabani, including those which have an historical background, have been submitted to the influence of this system and projected on to the heavens.
The conceptions connected with Nusku are of distinctly popular origin, as is shown by his prominence in incantations, which represent the popular element in the cult, and it is significant that in the astro-theological system of the Babylonian priests Nusku-Girru is not assigned to any particular place in the heavens.