Certain regions of the lunar surface light up when the Sun shines on them. 月面某些部分在太陽照射時會增亮起來。
In this paper, braking scheme and orbital optimization are discussed, assuming that the lunar detector approaches the moon vertically. 本文討論了月球探測器垂直接近月面情形下,制動方案選擇和軌道優化問題。