And if the Earth's orbital velocity slowed down, then it fall into a lower orbit to compensate.”.
理论上说,在任何的高度都可以获得需要的轨道速度,只是大气拖曳排除了高度太低的轨道。
Achieving orbital speed can theoretically occur at any altitude, although atmospheric drag precludes an orbit that is too low.
没有单一的高度(取决于你的轨道速度),但由于大气阻力,它只在350公里以上才实用。
There's no single altitude for this(it depends on your orbital velocity), but due to atmospheric drag it's only practical above 350 km.
目标卫星的轨道线速度取决于它的轨道高度,这也给我们了解反卫星拦截器的性能提供了依据。
The orbital speed of the target satellite, which is determined by its altitude, also provides us with significant insight into the interceptor's capability.
它的轨道速度达到每秒8,000公里,这个速度足以使广义相对论预测的效果可以检测到。
Its orbital velocity reaches 8,000 kilometers per second, a speed sufficient to make the effects predicted by the theory of general relativity detectable.
另一个是利用塔拉绕太阳半人马座阿尔法的轨道速度,和朱尼尔绕塔拉的轨道速度。
And the other is to take advantage of Tara's orbital speed around its sun Alpha Centauri, and Junior's orbital speed around Tara.
而一般来说,任何流星微粒必须拥有大于地球的轨道速度才能“赶上”我们。
So any meteoric particle must have an orbital velocity greater than that of the Earth to"catch" us.
而一般来说,任何流星微粒必须拥有大于地球的轨道速度才能“赶上”我们。
Any meteoric particle, therefore, must generally have an orbital velocity greater than that of Earth to"catch" us.
一个概念涉及部署大面积太阳帆,以降低卫星的轨道速度,使其最终重返大气层并在大气层烧毁。
One concept involved thedeployment of a large-area solar sail to reduce the orbital speed of the satellite, causing it to eventually re-enter and burn up in the atmosphere.
所以,你所期待的也许是如果你测量这些恒星运动的轨道速度,它们(速度)应该是边缘的比里面的慢。
So what you would expect is that if you measured the orbital speed of the stars, that they should be slower on the edges than on the inside.
This probe will reach record-breaking orbital velocities of up to 724,205 km/h, which works out to about 200 km/s-¹(or 0.067% the speed of light).
太阳围绕的銀心的轨道速度约为220千米/秒,包含在本地静止标准的运动中。
This speed is not to be confused with the orbital speed of the Sun around the Galactic center, which is about 220 km/s and is included in the movement of the Local Standard of Rest.
运送卫星的火箭使卫星获得了每秒八千米左右的必要的轨道速度。
The rocket launcher carried the satellite to the necessary orbital speed of about 8,000 meters per second.
运送卫星的火箭使卫星获得了每秒八千公尺左右的必要的轨道速度。
The rocket launcher carried the satellite to the necessary orbital speed of about 8,000 meters per second.
绿色的点明显与虚线不符:星系外的物体的轨道速度远快于预期。
Clearly, the green points do not match the dashed line:the rotational velocity of objects outside the galaxy is far faster than the prediction.
据初步材料,运送卫星的火箭使卫星获得了每秒八千公尺左右的必要的轨道速度。
According to the preliminary information,the carrier rocket has imparted to the satellite the required orbital velocity of about 8,000 meters a second.
据初步材料,运送卫星的火箭使卫星获得了每秒八千公尺左右的必要的轨道速度。
According to preliminary data,the rocket launcher carried the satellite to the necessary orbital speed of about 8,000 meters per second.
据初步材料,运送卫星的火箭使卫星获得了每秒八千公尺左右的必要的轨道速度。
According to preliminary data,the carrier rocket has imparted to the satellite the required orbital velocity of about 8000 meters per second.
因此进入轨道的太空航具不只是进入太空,还必须要有足够的轨道速度(角速度)。
So to enter orbit, a spacecraft must not only reach space,but must also achieve a sufficient orbital speed(angular velocity).
如果它继续沿着目前的轨道和速度前进,20年内将到达西伯利亚。
If it continues along its current trajectory and speed, within two decades it will reach Siberia.
为了在太空中进行稳定和持久的飞行,航天器必须达到闭合轨道所需的最小轨道速度。
In order to perform a stable and lasting flight in space,the spacecraft must reach the minimal orbital speed required for a closed orbit.
如果地球的轨道速度加快,那它将进入一个更高的轨道进行补偿。
If a satellite is accelerated to a higher speed,it will move into a higher orbit.
然而,当我们从星系中心进一步移动时,恒星的轨道速度基本保持不变。
However, as we move further from the centre of the galaxy, the orbital speeds of the stars remains roughly constant.
我们可以测量这些星系的速率,它们的轨道速度,并算出星系团中有多少质量。
We can measure the speeds of these galaxies, their orbital velocities, and figure out how much mass is in this cluster.
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