一个宇宙飞行员希望确定出他接近月球时的逼近速度。

A space navigator wishes to determine his velocity of approach as he nears the moon.

youdao

进行了基于平面三体模型的登月飞行器轨道控制方法的研究；研究了从近地低轨道到近月低轨道的飞行轨道；

The flight trajectories from low earth parking orbit (LEO) to low lunar parking orbit (LLO) based on a planar three-body model are studied.

youdao

1990年，日本发射了一个小型探测器，完成一次靠近月球的短暂飞行。

In 1990, Japan launched a small probe completing a brief fly-by the moon.

youdao