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Sosigenes of Alexandria
Ancient Greek astronomer
Lived -100–-100, aged 0
ScientistsScientist
Summary
Updated 2026-06-01
Sosigenes advised Julius Caesar on the Julian calendar's design—one of history's more consequential consultations between an astronomer and a dictator. Ancient Greek, barely remembered, massive ripple effect.
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Sosigenes was an Ancient Greek astronomer. According to Pliny the Elder's Natural History 18.210–212, Julius Caesar consulted him while he was designing the Julian calendar.
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Rising6.9
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Momentum8.6
Historical19.7
Source confidence60.0
Completeness45.0
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- WikidataHigh confidencewikidata · wikidata.org
- WikipediaHigh confidencewikipedia · en.wikipedia.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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