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Hipparchus was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece. He is known to have been a working astronomer between 162 and 127 BC.
Not who you're looking for? Others named Hipparchus: tyrant of Athens from c. 528 BC to 514 BC · crater on Mars · dialogue attributed to Plato · cavalry officer in ancient Greece
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