The Arabic and the Persian world under Islam had become highly cultured, and many important works of knowledge from Greek astronomy and Indian astronomy and Persian astronomy were translated into Arabic, used and stored in libraries throughout the area. An important contribution by Islamic astronomers was their emphasis on observational astronomy. This led to the emergence of the first astronomical observatories in the Muslim world by the early 9th century., in Roshdi Rashed & Régis Morelon (1996), Encyclopedia of the History of Arabic Science, pp. 985–1007, Routledge, London and New York. Zij star catalogues were produced at these observatories.
The Arabic and the Persian world under Islam had become highly cultured, and many important works of knowledge from Greek astronomy and Indian astronomy and Persian astronomy were translated into Arabic, used and stored in libraries throughout the area. An important contribution by Islamic astronomers was their emphasis on observational astronomy. This led to the emergence of the first astronomical observatories in the Muslim world by the early 9th century., in Roshdi Rashed & Régis Morelon (1996), Encyclopedia of the History of Arabic Science, pp. 985–1007, Routledge London and New York. Zij star catal,ogues were produced at these observatories.