In this paper, obtained the translunar trajectory for direct striking the moon, which satisfied some constraints including translunar flight time, lunar landing date.
在给定飞行时间、着月时间、着月入射角及停泊轨道等约束条件下，建立飞月轨道数学模型；
The more difficult second level requires a flight of 180 seconds followed by a landing on simulated lunar terrain, complete with rocks and craters.
更困难的第二个级别，要求飞行180秒，接着在遍布岩石和陨石坑的模拟月球地形上降落。
From the return pulse, LOLA determines the time of flight which, accounting for the speed of light, reveals the distance from the spacecraft to the lunar surface.
之后激光高度计将参照光速，计算出反射脉冲的渡越时间，从而获得飞船与月球表面之间的距离。
Paragon officials say future testing of the "Lunar Oasis" will be driven by Odyssey's flight schedule, which will not happen until 2012 at the earliest.
Paragon的官员称，未来对于“月球绿洲”的测试将取决于奥德赛公司的飞行时间表，最早也要等到2012年。
"If Yuri Gagarin had not made this flight I would not have flown to the moon," said US astronaut Thomas Stafford, commander on the first US lunar landing in 1969.
1969年美国登月计划指挥官、美国宇航员托马斯斯塔福德说：“如果尤里 加加林没有进行首次太空飞行，我可能也没有飞去过月球。”
Flight trajectories control technology from low earth orbit to lunar sphere of influence (LSOI) is present as well.
完成了从近地低轨道到月球影响球附近的轨道飞行控制方法的研究。
PERISCOPE is an instrument and mission concept with the goal of investigating and mapping lunar skylights from an orbiting platform using photon time-of-flight imaging.
PERISCOPE是一个仪器和任务概念，从一个轨道平台，使用光量子飞行时间成像法，（达到）调查和测绘月球天窗目的。
The flight trajectories from low earth parking orbit (LEO) to low lunar parking orbit (LLO) based on a planar three-body model are studied.
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.
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；
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