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Not who you're looking for? Others named hipparchus: 2nd century Greek astronomer, geographer and mathematician · crater on Mars · tyrant of Athens from c. 528 BC to 514 BC · dialogue attributed to Plato
Hipparchus, anglicized hipparch, was the title of an ancient Greek cavalry officer, commanding a hipparchia (unit of about 500 horsemen); two such units were commanded by an epihipparchos.
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