If a spacecraft travels faster than 11 km a second, it escapes the Earth's gravitational pull.
如果一架宇宙飞船飞行超过每秒11公里，它就能摆脱地球引力。
It is the gravitational interaction with planets, right?
这是引力与行星的相互作用，对吧？
Today such gravitational compensation probably would not occur: the outer layer of the Moon is too cold and stiff.
今天这种引力补偿很有可能不会发生：月球的外层过于寒冷和坚硬。
Third, the gravitational shield of the giant outer planets, while highly efficient, must occasionally fail to protect Earth.
第三，巨大的外行星的引力屏障虽然非常有效，但偶尔也会无法保护地球。
As Europa orbits its planet, however, it flexes due to the gravitational tug-of-war between it, its sister moons, and Jupiter.
然而，当木卫二绕其行星运行时，由于姊妹卫星和木星之间的引力拉锯战，它会弯曲。
According to one hypothesis, the planet's gravitational field tugs on the protoplanetary disk of dust and gas from which it formed.
根据一种假设，这颗行星的重力场会对由尘埃和气体组成的原行星盘产生牵引力。
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。
Astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them.
天文学家必须从黑洞对周围可见天体的引力影响推断出不可见的黑洞的存在。
Once Earth had gone through the final stages of its formation, gases bubbled to the surface and were held by Earth's gravitational field to form the atmosphere.
一旦地球经历了其形成的最后阶段，气体就会鼓泡到地表，并被地球的重力场控制，形成大气。
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。
And that is 2,000 times the gravitational acceleration.
这也就是重力加速度的2000倍。
But gravitational lensing had never before been used in such a precise way.
但是引力透镜还从未以如此精确的方法被使用过。
Free fall is when the forces acting upon you are exclusively gravitational.
自由落体是指，唯一作用力是重力的情况。
Another aspect of Einstein's work to be tested is the existence of gravitational waves.
爱因斯坦理论有待证实的另一个观点是引力波的存在。
In their final stages the mergers are expected to be intense sources of gravitational waves.
预计在最后阶段它们会合并成为强引力波源。
While looking out for a gravitational wave signal, scientists at GEO600 noticed something bizarre.
在寻找重力波信号的过程中，GEO600的科学家们发现了一些奇异现象。
Thanks to Newton's universal law, we can figure out the gravitational force between any two objects.
正是有了牛顿的万有引力定律，我们才能计算出任意两物体间的引力。
These waves are what those current and planned gravitational wave detectors are designed to look for.
现有的和待造的引力波探测器就是为它们准备的。
Cosmic strings would also create incredible gravitational waves, stronger than any other known source.
宇宙弦还会产生无与伦比的至强引力波。
And we have also seen gravitational attraction in space, and I will let you look at your notes for that.
我们还学习过空间中的万有引力，关于这个知识点，大家翻一翻笔记。
The astronomers found an "X-ray mass" only a tenth of the mass found using the gravitational lens method.
天文学家发现“X射线估算的质量”仅有“引力透镜”方法估算的质量的十分之一。
Many asteroids are weakly bound piles of rubble, held together by their own minute gravitational attraction.
大多数的小行星都是由碎石组成，而这些碎石靠着自身之间微弱的万有引力结合在一起。
Deacon only referred to it as a massive astronomical object, causing serious gravitational and other effects.
狄肯只提到它作为一个巨大的天体，能造成严重的引力和其他方面的影响。
The mechanism is unclear, but appears to include electromagnetic, gravitational, and other resonance effects.
这个机制目前还不清楚，但似乎包括电磁、引力和其他共振效应。
Astronomers measure how much dark matter lies in galaxies by a fluke of physics called gravitational lensing.
天文学家通过一种叫做引力透镜效应的物理现象来测算星系中暗物质的质量。
Astronomers measure how much dark matter lies in galaxies by a fluke of physics called gravitational lensing.
天文学家通过一种叫做引力透镜效应的物理现象来测算星系中暗物质的质量。
应用推荐