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Keywords: Shatir500.jpg Ibn al-Shatir's model for the appearances of Mercury showing the multiplication of epicycles in a Ptolemaic enterprise 14th century CE Online source http //microcosmos uchicago edu/ptolemy/islam html Microcosmos - Ptolematic Reconstruction University of Chicago Original source From T E Huff The Rise of Early Modern Science Islam China and the West Cambridge 1993 PD-old Arabic language Old astronomical prints Medieval astronomy Geocentric model Orbits Epicycle |