The two spacecraft will link up in orbit.
两艘宇宙飞船将在轨道上对接。
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。
This kind of periodic orbit is only a phase in a comet's life.
这种周期性轨道只是彗星生命中的一个阶段。
Periodic changes in Earth's orbit could affect Earth's climate.
地球轨道的周期性变化会影响地球的气候。
Once, we saw it was moving in a pattern consistent with an orbit.
有一次，我们看到它以与轨道一致的方式移动。
Its orbit brought it relatively close to the Earth, within 122 million miles of it.
它的轨道将它带到了距离地球1.22亿英里之内，距离地球相当之近。
The earth takes a year to orbit the sun.
地球绕太阳一周要一年的时间。
A new satellite has been put into orbit around the earth.
一颗新的人造卫星被送上了环绕地球的轨道。
All the planets orbit the Sun in roughly the same plane, around its equator.
所有行星基本在同一个平面上围绕太阳赤道运转。
Ground controllers will then fire the booster, sending the satellite into its proper orbit.
届时地面控制人员将点燃助推器，把卫星送入预定轨道。
The satellite was launched into the orbit around the moon.
卫星被射入环绕月球的轨道。
We can draw the earth's orbit round the sun.
我们可以画出地球绕太阳运行的轨迹。
So, the planet moves on its orbit.
行星在它轨道上运动。
From orbit: Launch was awesome!
发自轨道：升空真棒！
The orbit of a space satellite decayed.
人造卫星轨道的能量消减了。
THE Earth’s orbit is getting crowded.
地球的轨道变得越来越拥挤。
How can you keep ISS on its own orbit?
你们如何控制空间站在自己的轨道上运行？
Its orbit is within the earth's orbit.
它在地球的轨道上做环形运动。
Orbit of the Moon, and we see the Earth.
月球的轨道，以及我们看到的地球。
And why do the planets orbit the sun?
为什么行星绕着太阳转呢？
We call this unbound orbit larger or equal.
我们称之为释放轨道更大或者相当。
What about other big things still in orbit?
如果还有些大东西还在轨道上运行呢？
Q: What about other big things still in orbit?
问：如果还有些大东西还在轨道上运行呢？
But why does then the moon orbit the earth?
那么为什么月亮绕着地球转呢？
Let's imagine this is the electron in its orbit.
想象一下，电子在它的轨道中。
Humans now barely get beyond earth's lower orbit.
人类现在很少飞越地球的低轨道。
And this lowest orbit is termed the ground state.
这个最低轨道被称作基态。
But the general solutions call for a elliptical orbit.
但是，一般的解决方法，还是需要一个椭圆轨道。
Access to Earth orbit is expensive, and wildly wasteful.
进入地球轨道是昂贵的，也是疯狂的浪费。
Access to Earth orbit is expensive, and wildly wasteful.
进入地球轨道是昂贵的，也是疯狂的浪费。
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