冬天和夏天的出现是因为地球绕太阳公转时是倾斜的。
Winter and summer happen because the earth is tilted as it revolves around the sun.
火星绕太阳公转的周期是687天，这意味着火星上的1个地球年是687天。
Mars orbits the Sun in 687 days, which means 1 Earth year on Mars is 687 days.
时不时地，这些“脏雪球”会像行星一样绕着太阳公转。
Now and then these "dirty snow balls" begin to orbit the sun just as the planets do.
小王公转过身来，打量着他的仆人——至少园丁总管是这么想的。
The young Rajah turned and looked his servitor over—at least that was what the head gardener felt happened.
雇主们认为当员工由线下办公转为线上办公时，他们可以省下很大的一笔房地产费用。
Employers argue they make considerable savings on real estate when workers shift from office to home work.
当然，我们现在知道，包括地球在内的行星都围绕太阳公转，而太阳系只是宇宙的一小部分。
Of course, we now know that the planets, including Earth, revolve around the Sun, and that the solar system is only a tiny part of the universe.
但是这样的凌日现象已经为被证明可能是宇宙中最重要的突破之一的说法铺平了道路，这个说法即找到那些围绕其他恒星轨道公转的和地球大小相似的行星。
But such transits have paved the way for what might prove to be one of the most vital breakthroughs in the cosmos—detecting Earth-sized planets orbiting other stars.
地球既公转又自转。
地球在绕着太阳公转时也自传。
我想知道地球绕太阳，公转的动能是多少？
Now I wonder, what is the kinetic energy of the Earth in orbit around the sun?
好吧，这全都归结于地球沿着轨道绕太阳公转。
大多数行星都是在与母星赤道一致的平面上公转。
Most planets orbit in a plane that corresponds to their parent star's equator.
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.
它并不只是简单地绕原子核旋转，而是同时进行公转和自旋。
It doesn't simply orbit the nucleus, but as it orbits it spins.
作为对比，地球距太阳有9300万英里，公转一周需要365天。
Earth, by contrast, is 93 million miles from the Sun, and its orbit takes 365 days to complete.
VB10b距离它的恒星3000万英里远，每9个月公转一周。
VB 10b orbits its star about every 9 months at a distance of 30 million miles.
我还查了，公转周期-，木星为12年，地球为1年-，还有其它数据。
Then I looked up how many years it takes - to go around the sun — - 12 years for Jupiter, one year for the Earth — and I looked up all the other values.
(地球绕太阳公转一周约365天)，对比起来，月球约用29天左右绕地球一周。
(It takes about 365 days for the earth to make a complete revolution around the sun.) In contrast, the moon takes 29 days or so to make a complete cycle around the earth.
这颗行星，可能是一颗走恶运的星球，绕着它的母星快速公转快于一个地球日。
This planet, possibly an ill-fated world, whips around its star in less than one Earth day.
括地球在内）都沿着轨道绕着太阳公转。这代表太阳系平面，学名“黄道”。
the planets, Earth included, orbit around the sun on this celestial sheet.
地球的自转轴与黄道面呈一定角度。黄道面是地球公转轨道所在的一个假想平面。
The Earth's axis of rotation is tilted in relation to the ecliptic plane, an imaginary surface through Earth's orbit around the sun.
我们把地球围绕太阳公转的轨道称为黄道，把月球围绕地球公转的轨道称为白道。
We the Earth around the sun to the track known as the ecliptic, the moon around the Earth to the track known as the White Road.
Gliese 581g的质量是地球的3 -4倍，并且公转时间仅为37天。
It found that Gliese 581g has a mass three to four time the Earth's and orbits its star in just under 37 days.
月球的轨道是椭圆的，因此，就意味着它不是以正圆的方式环绕地球公转，而是椭圆。
The Moon's orbit is elliptical, meaning it does not follow a circular but rather an oval path.
低廉的花费，相对快速的几个月的公转周期使得微微卫星在教育方面上的价值无法估量。
The low cost and relatively quick turnaround time of a few months makes nanosatellites invaluable from an education perspective.
开普勒第三定律，也即调和定律，清楚地表明了行星公转周期与其离日距离之间的关系。
The third one, the law of periods, allows us to establish a clear relationship between a planet's orbital period and its distance from the sun.
地球要花费24小时完成绕地轴一周的自转，花费大约365天完成绕太阳一周的公转。
It takes Earth 24 hours to complete a rotation on its axis, and roughly 365 days to complete an orbit around the sun.
如果等效原理遭到违背，月球围绕地球公转的轨道将会出现偏斜——靠近或是远离了太阳。
If the equivalence principle were violated, the moon's orbit around the Earth would appear skewed, either towards or away from the sun.
这种情况每年平均发生一两次，不是每月都发生，因为月球绕地球公转的轨道稍稍有点斜。
This happens about once or twice a year, on the average, but not each month since the Moon's orbit around the Earth is slightly tilted.
这种情况每年平均发生一两次，不是每月都发生，因为月球绕地球公转的轨道稍稍有点斜。
This happens about once or twice a year, on the average, but not each month since the Moon's orbit around the Earth is slightly tilted.
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