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Biography
Influences
Achievements and Awards
Publications of Importance
Inventions or Contributions to Knowledge
Other Areas of Interest
Internet Links of Significance
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Hipparchus of Nicaea or Hipparchus of Bithynia was born in 190 BC in the town of Nicaea in Bithynia (now the city of Iznik in north-western Turkey)and lies on the eastern shore of Lake Iznik.
He died in 120 BC. He spent a lot of his life in Rhodes.
He was an mathematician and astronomer.
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Only one work by Hipparchus has survived, Commentary on Aratus and Eudoxus.
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Trigonometry:
Produced a table of chords or a trigonometric table.
Postulated he invented trigonometry.
Introduced the division of a circle into 360 degrees into Greece.
Calculated the length of the year to within 6.5 minutes
Discovered the precession of the equinoxes
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