The failure of this scientific activity in the Islamic world is often unfair to the invasion of the crusaders and the Mongols assigned, but it is mainly due to the fact that already ensure the vast majority of the population was forcibly converted to Islam so that the scientific research stagnated. The converts risked to devote themselves less to statements that contradict could be with their new religion. In the Quran its written that the sun every evening descends into a pool, which no scholar would ever dare to claim that the earth around the sun draait. In 1975 was an Imam in Saudi Arabia by a fatwa that the earth was flat and contradiction had to be punished with death. In the field of astronomy, the study indeed focused primarily towards the holy city of Mecca easy to find the correct daily prayers can be conducted. The refinements to the model of Ptolemy have not allowed them heliocentrism (the earth revolves around the sun) to re-discover, because he was already known by the Hindus in the 8th century BC. and by the Greek Aristarchus of Samos in the 3rd eeeuw BC. And there is as yet no scientific evidence that Copernicus was aware of or influenced by the techniques of Al-Tusi, on the contrary (Toby E. Hoff, 2003). That heliocentrism was not discovered in the Islamic world is also called to "thank" the fact that the Koran is there a greater restriction to freedom of thought went beyond the West. Even Galileo Galilei said, after he had to abjure the heliocentric theory by pressure from the church, "and yet she plays." They will never to the Dutch fysikus Lorentz developing the theory of relativity Einstein assign, for he had the impact of its formulas on this new theory at least, self-discovery.
