The orientation of the planet's orbit is changing continuously.
该行星轨道的方向不断变化。
Astronauts will make a final attempt today to rescue a communications satellite from its useless orbit.
宇航员们今天将做最后一次尝试，把一颗通讯卫星从它无用的轨道上拯救出来。
When we finish, ISS will be a premier, world-class laboratory in low Earth orbit.
当我们完成时，国际空间站将成为近地轨道上一流的世界级实验室。
Changes in the eccentricity of Earth's orbit occur in a cycle of about 96,000 years.
地球轨道偏心率的变化大约在96000年的一个周期内发生。
The earth's gravity slows the moon's rotation, matching it to the speed of its orbit.
地球引力减缓了月球的自转速度，使之与其轨道的速度相匹配。
Unlike earlier lunar missions, Clementine didn't orbit only around the moon's equator.
不像早些时候的月球探测那样，克莱门飞船并不是仅仅沿着月球的轨道飞行。
Within each orbit, collisions between planetesimals generated immense heat and energy.
在每个轨道内，天体之间的碰撞产生了巨大的热量和能量。
With nine engines on the first stage, Falcon 9 can reach orbit even if one or more fails.
猎鹰9号的第一级有9个引擎，即使一个或多个引擎故障，它仍然可以到达预定轨道。
Knowing the width of Earth's orbit, the parallax shift lets astronomers calculate the distance.
知道了地球轨道的宽度，视差偏移可以让天文学家计算距离。
You are probably aware that the earth's orbit around the sun is not shaped like a perfect circle.
你可能知道，地球围绕太阳的轨道形状不像一个完美的圆。
Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun.
天文学家在距离地球不远处发现一颗小行星，它与地球在同一轨道上围绕太阳运行。
When Earth's orbit is more elliptical, Earth is actually closer to the sun during part of the year.
当地球的轨道更接近椭圆时，地球实际上在一年的一部分时间里更接近太阳。
As the cost of getting your own satellite in orbit drops sharply, the risks of irresponsible use grow.
随着将自己的卫星送入轨道的成本大幅下降，不负责任使用卫星的风险也随之增加。
Just half a dozen holiday-makers have reached orbit since then, for similarly astronomical price tags.
从那之后，只有6个度假者到达了太空轨道，价格也同样是天文数字。
The shape of this orbit isn't consistent; it varies over time, over a period of about a thousand years.
轨道的形状并不是始终如一的；它会随时间变化，变化周期为一百年左右。
The government is more focused on preventing new debris from forming than taking the trash out of orbit.
政府更关注的是防止新的碎片形成，而不是把垃圾带离轨道。
Having your personal satellite launched into orbit might sound like an idea straight out of science fiction.
把你的个人卫星发射到轨道上，可能听起来像是科幻小说里的情节。
However, as the cost of getting your own satellite in orbit drops sharply, the risks of irresponsible use grow.
然而，随着将自己的卫星送入轨道的成本大幅下降，不负责任使用卫星的风险也在增加。
What we need is a really tall tower here on the ground right at the equator and a satellite in geostationary orbit.
我们需要的是一个在赤道处地面上的非常高的塔，以及沿地球静止轨道绕地运转的卫星。
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。
They might not come close to the ISS's orbit, yet Stern believes they will revolutionise the way we, the public, see space.
他们可能不会接近国际空间站的轨道，但斯特恩相信他们将彻底改变我们公众看待太空的方式。
As an organization of volunteers, AMSAT was putting "amateur" satellites in orbit decades before the current CubeSat craze.
作为一个志愿者组织，国际业余卫星组织在当前立方体卫星热潮之前的几十年前就在将“业余”卫星送入轨道。
These data have established a strong connection between variations in the Earth's orbit and the periodicity of the ice ages.
这些数据已经建立了地球轨道变化和冰期周期之间的强有力的联系。
As an organization of volunteers, AMSAT was putting "amateur" satellites in orbit decades before the current Cube Sat craze.
作为一个志愿者组织，业余卫星组织将“业余”卫星送入轨道的时间比现在的立方体卫星热潮早了几十年。
It is long known that Earth's orbit around the Sun changes periodically, cyclically affecting the way solar radiation strikes the Earth.
人们早就知道，地球围绕太阳的轨道会周期性地变化，周期性地影响太阳辐射照射地球的方式。
Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.
在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。
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