n.Greek astronomer and mathematician who discovered the precession of the equinoxes and made the first known star chart and is said to have invented trigonometry (second century BC)
英汉双解大词典
Hipparchus/hɪˈpɑːkəs/
1.
N（名词）
a large crater in the SW quadrant of the moon, about 130 kilometres in diameter 月球西南象限处直径约130公里的大火山口