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Hipparchus by Raphael.jpg
Hipparchus as he appears in "The Schuil o Athens" bi Raphael.
Born c. 190 BC
Died c. 120 BC

Hipparchus o Nicaea (Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC), wis a Greek astronomer, geografer, an mathematician. He is considered the foonder o trigonometry[1] but is maist famous for his incidental discovery o precession o the equinoxes.[2]

References[eedit | eedit soorce]

  1. C. M. Linton (2004). From Eudoxus to Einstein: a history of mathematical astronomy. Cambridge University Press. p. 52. ISBN 0-521-82750-7. 
  2. G J Toomer's chapter "Ptolemy and his Greek Predecessors" in "Astronomy before the Telescope", British Museum Press, 1996, p. 81.