长期以来，这种密度上的相似性促使人们猜测月球是从快速旋转的地球上分裂出来的，但这种想法创始于两次观测。
This similarity in density has long prompted speculation that the Moon split away from a rapidly rotating Earth, but this idea founders on two observations.
访问结束前，我被领到一个房间，在一个巨大的纯平显示器上有一个旋转的地球三维图像。
Toward the end of my tour, I was brought into a room where a three- dimensional image of the earth rotated on a large flat-panel monitor.
就旋转的地球模型和不运动的地球的模型而言，其地球动力学规律存在着本质的区别。
The laws of geodynamics differ essentially from the models of the unmovable or rotating Earth.
这是来自宇宙的数字图像，从中我们看到了几十个卫星轨道的数字表示，他们在高速旋转的地球。
This is an image from the digital Universe, in which we see the digital representation of the orbits of dozens of satellites as they rotate the Earth at high speed.
这些卫星处在平稳旋转的地球上空，几乎可以对全球的所有地区进行稳定的扫描，因此能很好地完成气象观察、通讯以及其它任务。
Such satellites—maintaining their steady sweeps as the earth revolves beneath them—cover all parts of the globe and hence are ideal for weather observation, communications and other tasks.
为了脱离月球，地球必须旋转得如此之快，以至于一天持续的时间少于三个小时。
In order to spin off the Moon, Earth would have had to rotate so fast that a day would have lasted less than three hours.
将泰坦尼克的碰撞理论化，消除了地球旋转过快的假设，并解释了月球特殊的组成。
Theorizing a titanic collision eliminates postulating a too-rapidly spinning Earth and accounts for the Moon's peculiar composition.
我们的行星地球，连同其他行星，围绕我们的太阳旋转，这就是我们的太阳系。
Our planet Earth, together with other planets, revolve around our Sun in what is called our Solar system.
因为地球旋转，所以它不是个完完全全的球体。
地心论是指以地球为中心，所以地心论认为，太阳、行星和恒星都围绕着地球旋转，而地球是静止的。
Geocentric means Earth-centered, so the geocentric view holds that the Sun, the planets, and the stars, all revolve around the Earth, which is stationary.
地球磁场是由地球外核的熔铁围绕固体内核旋转而产生的；当铁水激增，就会发生磁暴。
The Earth's magnetic field is generated as the molten iron of the Earth's outer core revolves around its solid inner core; when surges in the molten iron occur, magnetic tempests are created.
地球独特而巨大的卫星——月球，在稳定地球旋转轴的倾角方面发挥了关键作用。
Earth's unique and massive satellite, the Moon, plays a crucial role in stabilizing the obliquity of Earth's rotational axis.
最后，月球作为地球独特而巨大的卫星，在稳定地球旋转轴的倾角方面发挥了关键作用。
Finally, Earth's unique and massive satellite, the Moon, plays a crucial role in stabilizing the obliquity of Earth's rotational axis.
这些镜子可以在几千英里的高空以地球绕地轴旋转的速度运行。
The mirrors could orbit—thousands of miles high—at the same speed as the earth turns on its axis.
虽然木星不能够把地球从围绕太阳旋转的轨道上拉出来，但是它对地球的引力也产生了相当大的作用。
Though Jupiter is not able to draw the earth out of its course round the sun, yet it attracts the earth to some extent.
第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。
The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.
太阳一年内的轨迹形成这种形状是因为地球围绕着与太阳略微不同的轴旋转，而我们的地球也沿着椭圆形轨道运行。
The sun makes this shape over a year because Earth rotates on a slightly different axis than the sun, and our planet also travels on an elliptical orbit.
同时也发现，地球旋转时会拖拽时空-所谓的参考系拖拽现象。
It was also found that, as our planet rotates, it drags space-time with it - a phenomenon known as frame-dragging.
重力探测器B也证实了“坐标系拖曳效应”，地球的旋转使时空产生扭曲。
The satellite also confirmed the frame-dragging effect, in which the rotating Earth twists the surrounding spacetime.
不过，木星也并非对地球没有影响。虽然它不能够把地球从围绕太阳旋转的轨道上拉出来，但是它对地球的引力也产生了相当大的作用。
Yet Jupiter is not without influence upon the earth; and though it is not able to draw it out of its course round the sun, yet it attracts the earth to some extent.
答：地球发生相反方向的旋转是不可能的。
近地半球总是面对地球，远地半球总是远离地球，因为月球在绕地球旋转的同时，它也在以同样的速率绕自己的轴自转。
The near side is always facing Earth and the far side is always facing away, because the moon revolves around the Earth at the same rate that it rotates on its own axis.
顾名思义，太空升降梯是一根很长的电缆固定在地面的一端，另一端高高地延伸到太空中，就像一条从旋转的橙子中伸出的辐条那样伸出地球。
The space elevator is exactly what its name says it is: a long cable anchored at one end to the ground and at the other end high in space, protruding from the planet like a spoke in a rotating orange.
哥白尼和开普勒在第谷的观察数据基础上发现，我们并不是这个宇宙的中心，其它行星围绕着太阳旋转，我们的地球也是如此。
Copernicus and Kepler built on the observations of Tycho Brahe and found that we were not the center of the universe; other planets revolved around the sun, and so do we.
所以若以某种方法，我想，如果你们能够，通过减慢地球转速，转换地球的旋转能量，我们可以将其用于，弥补地球的能量消耗。
So if somehow I thought if you could tap the rotational energy of the earth by slowing the earth down, maybe we could use it to satisfy the world energy consumption.
曝光的天空被旋转着以补偿地球的自转，然后把一连串的图像叠放在一起，产生了与单一曝光相同的图像，可是很少有数码噪声。
The sky in the exposures was de-rotated to compensate for the rotation of Earth, then images were stacked together producing an image identical to a single exposure but with less digital noise.
一次地震可以使地球旋转得更快，通过将地球的质量向它的轴线轻推，正如滑冰的人可以通过缩回他们的手臂来使旋转加速。
An earthquake can make earth rotate faster by nudging some of its mass closer to the planet's axis, just as ice skaters can speed up their spins by pulling in their arms.
在其最接近点，这颗巨大的行星将旋转着靠近地球，而其亮度则会是1963年~ 2022年里最亮的。
At its closest approach, the giant planet will swing closer and shine brighter than at any time between 1963 and 2022.
一个箭头指向球体右方，那儿有一个地球围绕太阳旋转的图样，这个箭头意味着一年，暗示地球围绕太阳旋转一圈的时间。
To the right there's a drawing of Earth orbiting the Sun, with an arrow pointing to the right. The arrow means one year, the time of it takes the Earth to rotate around the Sun.
一个箭头指向球体右方，那儿有一个地球围绕太阳旋转的图样，这个箭头意味着一年，暗示地球围绕太阳旋转一圈的时间。
To the right there's a drawing of Earth orbiting the Sun, with an arrow pointing to the right. The arrow means one year, the time of it takes the Earth to rotate around the Sun.
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