The observer begins the telescope startup process around nautical twilight, preparing the telescope then adjusting the pointing and focus.

观测者大概在民用晨昏蒙影时开始启动望远镜，然后将望远镜指向目标并调好焦距。

youdao

The observer begins the telescope startup process around nautical twilight, preparing the telescope then adjusting the pointing and focus.

观测者大概在民用晨昏蒙影时开始启动望远镜，然后将望远镜指向目标并调好焦距。

youdao