Certain regions of the lunar surface light up when the Sun shines on them. 月面某些部分在太阳照射时会增亮起来。
In this paper, braking scheme and orbital optimization are discussed, assuming that the lunar detector approaches the moon vertically. 本文讨论了月球探测器垂直接近月面情形下,制动方案选择和轨道优化问题。