Hipparchus on the distances of the sun and moon

  title={Hipparchus on the distances of the sun and moon},
  author={Gerald J. Toomer},
  journal={Archive for History of Exact Sciences},
  • G. Toomer
  • Published 1 June 1974
  • Physics
  • Archive for History of Exact Sciences
"Hipparchus' investigation of this topic is based principally on the sun. For since it is a consequence of certain other properties of the sun and moon (which we shall discuss below) that when the distance of one of the luminaries is given that of the other is also determined, he tries to demonstrate the distance of the moon by guessing the distance of the sun. He first assumes that the sun has only the least perceptible parallax, in order to find its distance, and afterwards uses the solar… 
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