Impressionability of Safavid Abbasthe Great ruling from Astrology

Astronomy and its rules always have had a significant position in Iran history. One of the significant and main functions of astronomy was to inform about the future. Such a feature has made kings pay more attention to it. Among Safavid kings (907-1135), especially in Abbas the Great period (996-1038), astronomy had special importance. The main issue of the research is what effects had the astronomy and astronomers on Abbas the Great government?Based on historical data, findings of this study indicate that despite the conventional belief among researchers, Abbas the Great was not rationalist, rather had been extremely influenced by astronomers and astronomical rules from the beginning to the end of the kingdom. King’s trustworthy people were astronomers in martial, political, architectural, recreation affairs and the like and king avoided doing anything without their positive opinion. It seems that factors such as indoctrination, some correct predictions of astronomers, distrust in others and uncertain future of the government in general, have been effective in impressionability of Abbas the Great from astronomers and astronomical rules.