Most notably, Polish astronomer Nicolaus  Copernicus compared what he saw in the heavens with the theories of classical  astronomy expounded by Plato and Ptolemy.

最著名的是，波兰天文学家尼古拉·哥白尼将他在天空中看到的景象与柏拉图和托勒密阐述的古典天文学理论进行了比较。

86. The physicist was on an outing at nightfall observing frequent comets and radical stardust at the observatory for leisure when he wrote and copyrighted classical astronomy textbook for ordinary scholars.

这名物理学家在傍晚时分外出，为了消遣他到天文台去观测频繁（出现）的彗星和星云团，同时为普通学者们编写并出版了一部经典的天文学教科书。