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。
The earth's gravity slows the moon's rotation, matching it to the speed of its orbit.
它扁平的形状意味着土卫八曾经旋转得非常快，完成一次自转需要16个小时。
Its flattened shape implies that Iapetus once spun very quickly, completing a rotation in 16 hours.
火星自转一周的时间比地球长。
许多行星不寻常的倾斜和自转暗示了这些过程的激烈程度。
How violent these processes were suggested by the odd tilt and spin of many of the planets.
月球的自转和倾斜在太阳系的其他行星体中是独一无二的。
The Moon's spin and tilt are unique among other planetary bodies in the solar system.
金星自转一周需要243个地球日，因此来自太阳的热量以更悠闲、更容易观察到的速度被吸收和分配。
The planet Venus takes 243 earth-days to turn once on its axis, so incoming heat from the sun is added and distributed at a more leisurely, observable pace.
素描按照火星的自转排成螺旋状。
Arranged in a spiral pattern, the sketches are positioned to follow the planet's rotation.
他写过很多与地球自转有关的科学文章。
He has written many scientific articles on subjects related to the Earth's rotation.
不便之处是地球的自转并不是那样的准确可靠。
The snag is that the rotation of the Earth is not so reliable.
但这种影响向外扩散，逐层改变地核的自转速度。
But the effect ripples outward, changing the core's rate of rotation layer by layer.
到目前为止，类星体是测量地球自转最好的参照系。
Quasars are so far away that they constitute the best frame of reference for measuring Earth's rotation rate.
现在，月球的自转速度与绕地球公转速度是一样的。
Right now, the Moon's rotation rate, and the time it takes to orbit Earth are the same.
该机构从全球各地收集地球自转的测量值，并取其平均数。
It collects and averages measurements of the Earth's rotation from around the world.
北极是地球表面与假想的自转轴相交的北交点。
The North Pole is the spot on Earth’s globe that marks the northern end of an imaginary stick Earth spins around.
高层大气中时隐时现的发光的云团可能跟太阳的自转有关。
THE comings and goings of noctilucent or "night shining" clouds in the extreme upper atmosphere may be linked to the sun's rotation.
月球自转一直变慢，直到相当于环绕地球一周所花费的时间。
Over time the Moon rotation slowed until it equaled the time it took the Moon to go around the Earth.
地震同样被认为致使地球自转轻微改变，缩短了一天的时间。
The quake is also thought to have changed the planet's rotation slightly and shortened Earth's day.
这称为自转换。
九大行星都自转，它们又都围着太阳按同一方向转动。
Each of the nine planets turns on its own axis.They all go around the sun the same way.
但是在所有这些地区，都将需要24小时时间去完成一周的自转。
Yet in all of those places, it still takes 24 hours to complete a single rotation.
那么关于地球上的一天为什么变短的答案是，地球的自转加速了。
And the answer is for the day to get shorter, Earth's rotation has to speed up.
如果电子随机地自转，各电子所产生的磁场会彼此抵消。
If the electrons are spinning at random, these fields cancel each other out.
这个几何中轴靠近，但的确是和地球自转中心排成一行。
That figure axis is near, but does not quite align with, the rotational axis that the Earth spins around.
因此，我们可以用星星的自转速度及速率作为衡量它们年龄的计时器。
And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.
正如其它沿轨道运行的行星自转一样，这些小行星也有自转。
Just as most orbiting planets spin on their axes, so asteroids also rotate.
所以Meibom和他的同事们正在测量已知年龄的星星的自转速度。
So Meibom and his colleagues are measuring the rotation of stars whose ages they already know.
地球自转，明显地倾斜于太阳，而月球不同，它几乎笔直地绕太阳旋转。
Unlike Earth, which rotates on a significant tilt to the Sun, the Moon is barely tilted at all.
由于地球的自转，赤道以北的飓风是逆时针旋转的，赤道以南则是顺时针。
Due to the earth's rotation, hurricanes spin counterclockwise north of the equator and clockwise south of it.
相对论还包括一些更加深奥的细节，其中的一个被称作自转进动。
The theory of relativity also includes some more esoteric details, one of which is called spin precession.
在状态机编辑器中，您可以将自转换标记为该转换属性中的内部。
In the state machine editor, you can mark self-transitions as internal in the properties for the transition.
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