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The author:(作者)aaapublished in(发表于) 2013/12/12 9:31:50 Chang， third last night drop axle， three days later， the “Moon“
Authorities wide nets Beijing, December 11 (Xinhua Zhang Mian Mian), according to voice of the news aspect ratio reported yesterday, 9:20, Chang to fly in space for nine days, third [Twitter] ship, another successful orbit, from 100 km away from lunar orbit, lower in recent months, some 15 km aposelene 100 km elliptic orbit. It's Chang, third book of moon landing preparations on track.
This orbit is "Chang on the Moon" before the final orbit adjustments. On December 14, Chang e, third will carry out Lunar soft landing. Spaceship Earth at least hundreds of thousands of kilometers, semi-detached, Chang e, third for precise orbit? After the swingby, Chang e, third through which exercise?
Last night, the Beijing Aerospace command and control center lights, dozens of relevant staff intently staring at the big screen, shown here, He Change the third issue of the flight path of the Moon--21:20 to become immortal, the third by a preset command was successfully ignited, implementing the orbit control. Chang, third at the side of the Moon at this time, adjusting position, orbit parameters at 18 o'clock in the afternoon, finishing ahead of implantation.
21:24, Chang e, third back into the near side of the moon. Ground control-monitoring data analysis and judgement to become immortal, the third to 15 km away from the Moon's elliptical orbit, orbit successfully.
After the orbit to become immortal, the third closest to the Moon, the distance is only 15 km, one-fourth not to the marathon distance. Detector system expert Ma Jinan introduction, it was Chang third into the engine down before the final orbit adjustments:
Ma Jinan: elliptical orbit has a far-month point, there is a point in recent months, and in recent months, the height is the height of the plane before making preparations.
Last night, after the successful swingby, Chang e, third will continue to operate at current elliptical orbit four days or so. Will have a stable flight attitude, and reconfirmed by the landing sensors, landing data, etc, and landing the starting height, speed, time, doing last-minute preparations.
Ma Jinan: for example, decline in power we need sensors, test and confirmed that it is more crucial to the process. Prior to landing, we will extend the solar wings to gather, for the safety of the lander.
Scheduled to become immortal, the third will be in Beijing on December 14, a soft landing on the lunar surface, the 15th, Chang, third release China-made "Moon" Rover. This will be the first extraterrestrial spacecraft landing and inspection of the exploration of celestial bodies, is also a first time after 1976 human detectors of moon exploration.
Blessing is an elliptical orbit of the Moon Tower ", third" all the best.
(Original title: Chang, third last night, three days after successful drop axles will wander into "Moon")
央广网北京12月11日消息（记者张棉棉）据中国之声《新闻纵横》报道，昨天晚上九点二十分，在太空飞行了九天的嫦娥三号[微博]飞船，再次成功变轨，从100公里×100公里的环月圆轨道，降低到近月点15公里、远月点100公里的椭圆轨道。这也是嫦娥三号预定的月面着陆准备轨道。
这次变轨，是“嫦娥登月”前的最后一次轨道调整。12月14号，嫦娥三号就将实施月面软着陆。飞船离地球至少有几十万公里，万里之遥，如何让嫦娥三号实现精确变轨？变轨之后，嫦娥三号还将经历哪些考验？
昨晚，北京航天飞行控制中心内灯火通明，几十名相关工作人员目不转睛地盯着大屏幕，这里显示着月球和嫦娥三号的飞行轨迹——21:20分，嫦娥三号按照预设指令成功点火，实施变轨控制。此时嫦娥三号处于月球背面，相关的调姿、变轨参数是在下午18点整提前注入的。
21:24分，嫦娥三号重新回到月球正面。地面测控监视数据分析判断，嫦娥三号进入15公里×100公里的月球椭圆轨道，变轨成功。
变轨后，嫦娥三号距离月球最近的距离只有15公里，不到马拉松距离的四分之一。探测器系统专家马继楠介绍，这是嫦娥三号进入动力下降段前最后一次轨道调整：
马继楠：椭圆轨道有一个远月点，有一个近月点，近月点的高度就是为了着陆前的高度做准备。
昨晚成功变轨后，嫦娥三号将在目前的椭圆轨道上继续飞行四天左右。期间将稳定飞行姿态，对着陆敏感器、着陆数据等再次确认，并对软着陆的起始高度、速度、时间点做最后的准备。
马继楠：比如动力下降段我们需要的敏感器，进行测试和状态确认，这是比较关键的过程。软着陆之前，我们会将太阳翼收拢，为了着陆器的安全。
按照计划，嫦娥三号将在北京时间12月14号在月球表面实现软着陆，15号，嫦娥三号将释放国产“玉兔”号月球车。这将是我国航天器首次在地外天体的软着陆和巡视勘探，同时也是1976年后人类探测器首次的落月探测。
祝福正在月球椭圆轨道飞行的“嫦娥三号”一切顺利。
（原标题：嫦娥三号昨晚成功降轨 三天后将翩然“落月”）
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