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Loading contentAl-Battani was among the most influential astronomers of the medieval Islamic world, observing from Raqqa in present-day Syria. His careful measurements corrected and extended Ptolemy, his astronomical tables circulated for centuries, and his work was cited by Copernicus more than six hundred years later.
Facts on this topic will be cited from these primary and reference sources.
General reference for the history of astronomy, biographies, and cultural context.
Official naming, definitions, constellation boundaries, and astronomical nomenclature.