The orbit of this comet intersects the orbit of the Earth.
这颗彗星的轨道和地球的轨道相交。
One characteristic of Earth's orbit is its eccentricity, the degree to which the orbit is an ellipse rather than a circle.
地球轨道的一个特点是它的离心率，也就是轨道是椭圆而不是圆形的程度。
Mars's orbit around the Sun is the fourth fastest orbit of all the solar system planets.
在太阳系所有行星中，火星绕太阳的轨道速度第四快。
Orbit the moon travels in an orbit around the earth.
月亮在绕着地球的轨道上运行。
They could go into lunar orbit or into solar orbit halfway between the Earth and Venus, or one day even land on the moon.
他们可能飞到月球轨道或者地球与金星之间的太阳轨道，甚至有一天降落在月球上。
So, in principle, you can determine for each one of those stars the velocity in orbit, the radius of their orbit and, of course, the period of the binary system.
所以从原则上来说，你们可以决定任何,恒星在轨道中的速度，轨道的半径以及，当然，二元体系的周期。
This orbit (a high Earth or geosynchronous orbit) means that the satellite will always be directly over the same point on Earth, ensuring a continuous view of the ground.
这条轨道(高地同步轨道)意味着这些卫星总是位于地球上的某点之上，保证对地的持续观察。
I now go into an elliptical orbit because the new velocity is no longer the right velocity for a circular orbit.
我现在要进入一个椭圆形轨道，因为新的速度已经，不是圆形轨道中的速度。
In response, Bolden referred to the possibility of setting up fuel depots in orbit, which could enable smaller rockets to make trips beyond low-Earth orbit.
在答复中，博尔登提及在轨道中建立燃料补给站的可能，这样小型火箭就可以实现低地球轨道的运行。
The classic "blowout fracture" is the result of a blow to the anterior orbit, which increases retroglobar pressures thus breaking the weakest portion of the bony orbit, the medial floor.
典型的“爆裂性骨折”由作用于眼眶前部的冲击力造成，其可增加眼球后部的压力，从而破坏骨性眼眶的最薄弱部分——内侧壁。
It follows that the Moon's orbit is primarily determined by the gravitation pull from the Sun, so the orbit of the Earth will always curve towards the Sun.
由此断定月球的轨道主要由来自太阳的牵引力决定，所以地球对于太阳的轨道一直是椭圆形的。
Some believe it's risky to alter Earth's orbit, while others fear the jump will make the Gregorian calendar obsolete because of the length of Earth's new orbit.
有些人认为改变地球轨道太危险，其他一些人则担心由于这一跳会使地球轨道变长，所以要改写公历。
After it reaches orbit, the craft will be dropped, and its hybrid motors will be used to adjust its orbit or dock it to a space station.
进入轨道之后，飞行器被剥离，并利用其混合动力发动机调整轨道进而与空间站对接。
Ok, so that's an interesting law because it tells you, once you know what the orbit of the planet looks like, it tells you how fast it's going to move on that orbit.
这是个很有趣的定律，因为它告诉你们行星运动的轨迹，也告诉你们它在轨迹运动的速度快慢。
The radius of the Earth's orbit is about 400 times the radius of the Moon's orbit.
地球的轨道半径大约是月球轨道半径的400倍。
The orbit of the earth around the sun is eccentric because the orbit is slightly elliptical and so has effectively has two centres (neither of them the centre of the sun).
地球环绕太阳的公转轨道是偏心的，这是因为地球的公转轨道稍微呈椭圆形，所以这个轨道实际上就有两个中心（这两个中心都不与太阳的中心重合）。
Its orbit is within the earth's orbit.
它在地球的轨道上做环形运动。
For instance, five of the six planets orbit closer to their parent star than any planets in our solar system orbit the sun.
比如，其6个行星里有5个围绕其母星的轨道距离比我们太阳系里任何一个行星到太阳的轨道距离都要近。
Messenger and is using gravity from Earth and Venus to slightly alter its orbit over time before it moves into Mercury's orbit in March 2011.
预计信使号飞船将于2011年3月进入水星的运行轨道，在这之前它要借助来自地球和金星的引力，稍微调整一下自己的轨道。
Seen here with its three known moons, Charon, Nix, and Hydra, Pluto is a member of a group of objects that orbit in a disklike zone beyond the orbit of Neptune called the Kuiper belt.
这里可以看见它的已知3个卫星：冥卫1，冥卫2，和冥卫3。 包括冥王星在内的一群物体，在海王星的凯伯带（数十亿颗在海王星轨道之外绕行的小型冰体构成的碟形带）之上，围绕着太阳的作盘形轨道运行。
After spending a year in orbit around Vesta, Dawn will perform a trick rare in space travel-it will reignite its engines and head off to orbit another body.
在灶神星轨道呆了一年之后的“黎明”号将在太空旅行中进行一次罕见的表演- - -它会重新点燃发动机并转变方向环绕另一个天体运行。
In the meantime, it could replace chemical rockets for pushing satellites from low Earth orbit to geostationary orbit.
同时，它可以取代化学燃料火箭来帮助卫星从近地轨道变轨至静止轨道。
The propulsion subsystem is essential for maneuvering the MUOS satellite during transfer orbit to its final location as well as conducting on-orbit repositioning maneuvers throughout its mission life.
在把MUOS卫星变轨到最终位置以及执行任务寿命期内的在轨机动性重新配置上，该推进系统是很关键的。
Besides the thousands of Trojans that co-orbit the sun with Jupiter, astronomers have discovered a handful that co-orbit the sun with Neptune and Mars. 2010 TK7 isn't a threat to Earth.
除了数千个一起与木星围绕太阳运行的特洛伊小行星之外，天文学家们发现了几个随着海王星和火星一起围绕太阳运转的行星。2010TK 7对地球不会造成威胁。
The precision index for the carrier rocket that carries the spacecraft entering the orbit is highly upgraded; besides its life-span in the orbit is increased by a big margin.
发射飞船的运载火箭入轨精度指标比过去有大幅提高；另外，在轨寿命要求大幅提高。
Stars orbit the pivot point at the center of galaxies, planets in turn orbit stars, and moons in turn orbit planets.
恒星围绕着星系轴心转，行星围绕着恒星转，卫星围绕着行星转。
A fast design method for transfer orbit of lunar probe is presented using overlap conic curve method aimed at lunar landing transfer orbit and lunar satellite transfer orbit.
利用重叠圆锥曲线方法，针对着陆型和月球卫星型两种地月转移轨道，给出了一种地月转移轨道的快速设计方法。
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.
以地球为中心的最近点；人造卫星轨道上离地球中心最近的点。
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