人造卫星轨道的能量消减了。
以地球为中心的最近点；人造卫星轨道上离地球中心最近的点。
Periapsis in earth orbit; the point in its orbit where a satellite is nearest to the earth.
以地球为中心的最远点；人造卫星轨道上离地球中心最远的点。
Apoapsis in earth orbit; the point in its orbit where a satellite is at the greatest distance from the earth.
本文介绍程序覆盖法在人造卫星轨道改进程序中应用的一个例子。
In this paper an example is given for the application of the routine overlay method to the retrofit program of the.
本文介绍程序覆盖法在人造卫星轨道改进程序中应用的一个例子。
In this paper an example is given for the application of the routine overlay method to the retrofit program of the. orbit of an artificial earth satellite.
一颗新的人造卫星被送上了环绕地球的轨道。
由于月球阻碍了与探测器的直接无线电通信，中国首先必须把一颗人造卫星送入月球轨道上的一个点，人造卫星可以从那里向航天器和地球发射信号。
Because the moon's body blocks direct radio communication with a probe, China first had to put a satellite in orbit above the moon in a spot where it could send signals to the spacecraft and to Earth.
尽管这并不足以使太空垃圾偏离轨道，但已足够防止它们和人造卫星或者太空站相撞。
While that won't be enough to knock it out of orbit, it could be sufficient to avoid a collision with a space station or satellite.
当科学家计划将一颗人造卫星送上月球轨道时，这种计算能力便显得尤为重要。
This ability is especially useful when scientists are, say, planning to put a satellite in orbit or charting the course of the moon.
由月球制造的太阳能人造卫星将被安置在许多行星及其卫星的轨道上，成为这些星球的观察站，并以太阳光为能源连续不断地工作。
Solar power satellites that have been manufactured on the moon will have been placed in orbit around a number of planets and moons, providing nearby planetary outposts with continuous electric power.
这个人造卫星的轨道，其最远点在离地球200英里的地方。
The orbit of the artificial satellite has an apogee of 200 miles from the earth.
这个人造卫星的轨道， 其最远点在离地球200英里的地方。
The orbit of the artificial satellite has an apogee of 200 miles from the earth.
去年两个人造卫星相撞，留下上百片十公分大小的碎片散布在环绕地球的轨道上。
TWO satellites collided last year leaving hundreds of pieces of shrapnel more than 10cm across orbiting the Earth.
第一颗人造卫星，苏联制的“史普尼克一号”从地球上发射开始轨道运行，为地球的太空世纪开启了曙光。
First artificial satellite launched fr Earth. Sputnik I is orbited by the Soviet Union, arking the dawn of Earth's Space Age.
伊朗宣称最近已经把一颗人造卫星放入轨道，但是没有确凿的证明。
Iran claims to have put a satellite in orbit recently, but there is no conclusive proof.
人造卫星成功地被发射进入火星的轨道中。
The satellite was successfully launched into the orbit of Mars.
在轨道活跃900颗人造卫星，而且几乎它们一半是美国的。
Some 900 active satellites are in orbit, and nearly half of them are American.
每一颗人造卫星根据其不同目的选用不同的运行轨道。
Each satellite has its own orbit which is selected according to its purpose.
它是在绕地球轨道上运行的人造卫星。
大气最外层的空气非常稀薄，但空气分子仍能产生阻力减慢人造卫星的速度，这样工程师们就得定期把它们推回到其正确的轨道上。
Air in the atmosphere's outermost layer is very thin, but air molecules still create drag that slows down satellites, requiring engineers to periodically boost them back into their proper orbits.
大多数情况下，人造卫星自观测者的西方升起，经过中天，然后在东方落下，虽然越极轨道人造卫星可以在天空的任意部分升起和落下！
In most cases, the satellite will rise in the west, cross the observer's meridian, and set in the east, although satellites in a polar orbit can rise or set in any part of the sky!
2006年，这些天体物理学家发射了一艘人造卫星，命名为PAMELA，进入低地球轨道，专为寻找宇宙射线中的反质子。
In 2006, these guys launched a spacecraft called PAMELA into low Earth orbit, specifically to look for antiprotons in cosmic rays.
反作用力把人造卫星送入轨道。
人造卫星的精确轨道参数将由无线电和光学观测站测量得出。
Accurate measurement of the orbit parameters of the artificial satellite was provided by radio and optical stations.
每次任务都发射一枚具备从火星轨道拍摄火星表面能力的人造卫星，同时充当与海盗登陆者进行联络的中间站。
Each mission had a satellite designed to photograph the surface of Mars from orbit, and to act as a communication relay for the Viking lander that each mission carried.
每次任务都发射一枚具备从火星轨道拍摄火星表面能力的人造卫星，同时充当与海盗登陆者进行联络的中间站。
Each mission had a satellite designed to photograph the surface of Mars from orbit, and to act as a communication relay for the Viking lander that each mission carried.
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