火星是离太阳第四远的行星，也是地球之外的下一个行星。
Mars is the fourth planet from the Sun and the next planet beyond the Earth.
现在归类于矮行星的冥王星是那么小，那么远，对天文学家来说，其表面一直是个谜。
Pluto, now classed as a dwarf planet, is so small and so distant that its surface has been a mystery to astronomers.
这意味着如果我们将来对这颗离我们20.5光年远的行星有任何殖民打算的话，只能再说了。
That means we'll have to put any distant plans to colonize the planet that's 20.5 years away from our own on hold.
研究者已经在寻找那些距离其母恒星的引力足够远，以致可能庇护安定的卫星的巨型行星。
Already researchers are locating giant planets far enough from the gravitational pull of their host star to potentially harbor stable satellites.
这颗行星所绕行的是一颗暗淡的红矮星，距地球20光年远，名为Gliese 581。
The planet orbits a dim red dwarf star 20 light years from Earth called Gliese 581.
一开始你可能不会这样认为，因为太阳系里和彗星发生过碰撞的行星都比火星还远，在那样的轨道上水永远是以冰的形式存在。
On first blush, you might think not: the planet where the comet or comets came to grief is farther out than Mars, in an orbit where water would be permanently frozen.
但是，假设距离我们仅有4.3光年远的一颗系外行星上，有一头徜徉漫步的大象，我们如果要拍到它，也得使用一个直径有太阳那么大的望远镜。
But it would take a telescope with the effective diameter of the sun to actually take photographs of something the size of an elephant strolling on an exoplanet only 4.3 light-years away.
它围绕着一颗距地球28,000光年远的红矮星运行，这使它成为目前已知的最远的外行星。
It orbits a red dwarf star about 28, 000 light-years away, making it the most distant exoplanet currently known.
第三颗被称作比邻星的红矮星，在相当远的距离之外绕这两颗恒星旋转，由于亮度太弱费希尔的团队无法对其进行研究，不过它也可能拥有质量较小的行星。
The third star, a red dwarf called Proxima Centauri, circles this couple at a considerable distance and is too faint for Fischer's team to study, but it could boast small planets, too.
外太阳系行星GJ1214b是一颗约有40光年远的由岩石组成的多水行星。
The extrasolar planet GJ 1214b is a rocky planet rich in water that sits about 40 light-years away.
这颗行星距离地球有1,400光年之远，它围绕恒星高速公转一周只需三天半的时间。
The planet is located about 1, 400 light years away from Earth and zips around its parent star in only three and a half day.
也被称作阿贝尔21，水母星云是双子座中一个1500光年远的年老行星状星云。
Also known as Abell 21, this Medusa is an old planetary nebula some 1, 500 light-years away in the constellation Gemini.
在这一批最新发现的行星中，最大的是HD 85512b。其质量是地球的3.6倍，离船帆座36光年远。
The biggest planet of the new batch is HD 85512 b, which is 3.6 times the mass of Earth and can be found 36 light-years away in the Vela constellation.
由迭代算法得到的直到六阶的摄动补充完整了远日的四个行星的理论。
Perturbations up to the sixth order obtained by an iterative method complete the theory of the four outer planets.
从前，在一个离这里很远很远，远得令你难以置信的太阳系里，有两颗行星，它们的名字是Yee和Lan，它们深深地相爱着。
Once upon a time, in a solar system which is so, so far away from here that you wouldn't believe me if I told you, were two planets. Their names were Yee and Lan, and they loved each other very much.
杰西：是啊，在他的课本里，冥王星还是一颗行星呢。现在却不是了。远。
Jesse: : Yeah, in his textbooks, Pluto was still a planet. It's not any more.
死星摧毁里肯的家园时，他不在母星，而在视察位于德拉亚行星远轨道的新卫星传输系统。
Rieekan was off-planet, inspecting a new satellite transmission system in far orbit around the planet Delaya when the Death Star obliterated his home.
基督·迈克尔对这颗小行星有着非同小可的兴趣，因为它有着严重的问题，并且远落后于计划。
Christ Michael has taken a serious interest in this little planet, because it has had huge problems, and is way behind schedule.
存在这么一个行星，它环绕天琴座星系中一颗600光年远的恒星运行，之前被怀疑的不存在。
The existence of this planet, which circles a star 600 light-years away, in the constellation of Lyra.
如果参宿七像我们肉眼能看到的最明亮的星星(只有8.6光年远)天狼星那样近，它将比金星更明亮，可以说是我们天空中最明亮的行星。
If it were as close as Sirius, the brightest star visible to the eye (and only about 8.6 light-years away), Rigel would shine much more brilliantly than Venus, our sky's brightest planet.
由于它和太阳之间的距离渐远，太阳的磁场所起的主导作用更少了，而行星X想要回到与太阳肩并肩对齐的状态。
As it puts distance between itself and the Sun, the Sun's magnetic field has less dominance, and Planet X wants to return to a side-by-side arrangement with the Sun.
欧阳自远称，火星计划另外一个重要目标是，探测地球以外的太阳系，并将其它类地行星的起源与太阳系的形成相比较。
Ouyang said another important goal of the Mars mission was to detect solar systems beyond earth's reach and to compare the origins of earth-like planets with the formation of the solar system.
它被创造出来时远没有那么大，它是靠吃行星长大，我们的行星就被它吃了！
But keep one thing for sure—it was not at all that huge at the biginning that it was created. The devourer grows by eating planets, and our planet is one of the victims!
为了我们，他们奔赴疆场，英勇捐躯，长眠于超越群星，甚至超越时间的新地空域，甚至更荒远的无名行星。
For us, they fought and died, in places like Xindi spans and even some desolate unnamed planet; far beyond the stars, even time.
下一次小行星如此接近地球将是在2028年，届时小行星2001WN5将在距离地球约143,000英里远的地方经过。
It will be 2028 before another asteroid comes so close to Earth, when the asteroid 2001 WN5 passes at a distance of about 143,000 miles.
我们继续看着彼此忽远忽近，就像两颗行星在它们的轨道，有时候非常近，却从来没有完整的出现在彼此的世界。
We continued to see each other off and on like two planets in orbit, sometimes close but never completely in each other's world.
它是离太阳第四远的行星。
可能是因为这颗木星大小的行星原来运行的轨道与木星相似，比地球到太阳的距离要远上许多。
That's probably because the Jupiter-size world originally occupied a Jupiter-like orbit, much farther from its star than Earth is from the Sun.
可能是因为这颗木星大小的行星原来运行的轨道与木星相似，比地球到太阳的距离要远上许多。
That's probably because the Jupiter-size world originally occupied a Jupiter-like orbit, much farther from its star than Earth is from the Sun.
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