Sosigenes of Alexandria (100–100 BCE)
Born 100 BCE, died 100 BCE.
Sosigenes (Ancient Greek: Σωσιγένης) (fl. 1st century BC) 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.
Text from the Wikipedia article Sosigenes_(astronomer), licensed CC BY-SA 4.0.