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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]

Hipparchus wis born in Nicaea, Bithynia (nou İznik, Turkey), an probably dee'd on the island o Rhodes, Greece. He is kent tae hae been a wirkin astronomer at least frae 162 tae 127 BC.[3] Hipparchus is conseedert the greatest auncient astronomical observer an, bi some, the greatest overaw astronomer o antiquity. He wis the first that's quantitative an accurate models for the motion o the Sun an Muin survive. For this he certainly made uise o the observations an aiblins the mathematical techniques accumulatit ower centuries bi the Babylonies an bi Meton o Athens (5t century BC), Timocharis, Aristyllus, Aristarchus o Samos an Eratosthenes, amang ithers.[4] He developed trigonometry an constructit trigonometric tables, an he solved several problems o spherical trigonometry. Wi his solar an lunar theories an his trigonometry, he mey hae been the first tae develop a reliable method tae predict solar eclipses. His ither reputit achievements include the diskivery an meisurment o Yird's precession, the compilation o the first comprehensive starn catalogue o the wastren warld, an possibly the invention o the astrolabe, an aw o the airmillary sphere, that he uised in the creaution o muckle o the starn catalogue.

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.
  3. Stephen C. McCluskey (2000). Astronomies and cultures in early medieval Europe. Cambridge University Press. p. 22. ISBN 978-0-521-77852-7. 
  4. Jones, Alexander Raymond (2017). Hipparchus. Encyclopedia Britannica, Inc. Archived frae the oreeginal on 6 August 2017. Retrieved 25 August 2017.