190 BC
Hipparchus was born in Nicaea, Bithynia (now modern-day Iznik, Turkey)
170 BC
146 BC
Hipparchus measured the positions of stars and created the first known star catalog
130 BC
Hipparchus developed the first known trigonometric table
125 BC
Hipparchus observed a solar eclipse and his observations helped refine the calculation of the moon's orbit
120 BC
Hipparchus' work laid the foundation for future astronomical studies. He is often regarded as the greatest astronomer of antiquity