ABSTRACT
This chapter takes its starting date as the eleventh century AD for several reasons. First, one can argue that it was in the eleventh century that Arabic astronomy was finally 'acclimatized' within the Islamic environment and from then on it began to be coloured with whatever prerequisites that environment demanded. From this perspective several works began to be characterized by original production, and were no longer mere repetitions of problems that were discussed in the Greek tradition. Figures such as Abu Sahl al-Kuhl, Abu al-Wafa9 al-Buzjanl, BIrunI, Mansur ibn Nasr ibn 'Iraq, etc., who lived just around the turn of the previous century, were setting the grounds for this new production in astronomical research. This work could still be considered as a continuation of that of Habash al-Hasib, Thabit Ibn Qurra, Khwarizml and others of the previous ninth century.
