Cosmology in medieval Islam empirical testing. His work thus marked a turning point in astronomy, which may be considered a "Scientific Revolution before the Renaissance". His rectified model was later adapted into a heliocentric model by Copernicus, which was mathematically achieved by reversing the direction of the last vector connecting the Earth to the Sun. In the published version of his masterwork, "De revolutionibus orbium coelestium", Copernicus also cites the theories of al-Battani and Averroes as influences. An area of active discussion in the Maragheh school, and later the Samarkand and Istanbul observatories, was the possibility of the Earth's rotation. Supporters of this theory
The Royal Hunt of the Sun Music is a key element to this play, more so than any other by Peter Shaffer. He wanted strange and disturbing sounds produced on primitive instruments such as saws, reed pipes, drums (tablas and bongos) and cymbals to create the aural world of 16th Century Peru. Shaffer was so impressed with Marc Wilkinson's score for "The Royal Hunt Of The Sun", which he has described as "perhaps the best score for a play to be written since Grieg embellished "Peer Gynt"", that he now considers it integral to the play. The staging is relatively simple: an upper and lower part