For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study.

For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study.

因为天文学家有责任通过仔细而专业的研究来撰写天体运动的历史。

-- Nicolaus Copernicus 哥白尼