Hipparchus
2nd century Greek astronomer, geographer and mathematician
Summary
Updated 2026-05-29
Ancient Greek astronomer who mapped the stars and accidentally discovered that Earth's axis wobbles over time—a detail that would reshape how humans understood their place in the cosmos. Also invented trigonometry, because apparently that was just a side project.
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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.
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Stable16.0
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Momentum1.0
Historical21.3
Source confidence60.0
Completeness60.0
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- WikidataHigh confidencewikidata · wikidata.org
- WikipediaHigh confidencewikipedia · en.wikipedia.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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