astronomer

The astronomer spent the entire night tracking the trajectory of a near-Earth asteroid using the telescope.

(Chinese) 天文学家整晚都在使用望远镜追踪一颗近地小行星的轨迹。

Nicolaus Copernicus was a Polish astronomer who proposed that the Earth revolves around the Sun.

(Chinese) 尼古拉·哥白尼是一位波兰天文学家，他提出了地球绕太阳公转的理论。