Planetary Theories and Cosmology, Islamic Theories

  title={Planetary Theories and Cosmology, Islamic Theories},
  author={A. Ragab},
Following Ptolemy’s instructions in the Almagest that “he who comes after us throughout the epochs take measurements as we have done, and if they find an imperfection, they should correct,” Islamic works of astronomy were motivated in part with this process of minor rectifications, along with two other lines of inquiry: creation of astronomical tables (zij) and timekeeping, on the one hand, and planetary theories on the other. Ptolemy’s Almagest remained the more influential text in medieval… Expand