Alfonsine tables or Alphonsine tables (ălfŏnˈsĭn) [key], compilation of astronomical data tabulating the positions and movements of the planets, completed c.1252 and printed in Venice in 1483. They were a revision and improvement of the Ptolemaic tables and were compiled at Toledo, Spain, by about 50 astronomers assembled for the purpose by Alfonso X of Castile.
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