In 1997, they saw evidence of planets near other stars like the sun.
1997年，他们发现了太阳等其他恒星附近有行星存在的证据。
Do economics and finance work in the same way as weather conditions or the movement of planets?
经济和金融的运作方式与天气条件或行星的运行相同吗？
Astronomers suspect that pairs of planets also engage in this slingshot activity, leaving them in disturbed, elliptical orbits.
天文学家怀疑成对的行星也参与了这种弹弓活动，使它们处于不规则的椭圆轨道上。
The substances that make up both groups of planets are divided into three groups—gases, rocks, and ices—based on their melting points.
这两组行星的构成物质根据熔点分为三类：气体、岩石和冰。
The nearly circular orbits of planets in our solar system led scientists to expect that planets around other stars would also reside in circular orbits.
在我们的太阳系中，行星的轨道几乎是圆形的，这使得科学家们预测，其他恒星周围的行星也会位于圆形轨道上。
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.
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。
So the opinion was the spots were actually something else, like shadows of planets crossing the Sun's face.
所以当时的看法是，那些黑点实际上是别的东西，比如其他行星经过太阳时留下的阴影。
We can tell in our galaxy there must be billions of planets.
我们知道在银河系内有几十亿颗行星。
"There are a large number of planets, and most of them are small," Stern said.
行星数目众多，绝大多数都很小。
The orbits of planets in the Gliese 581 system are compared to those of our own solar system.
Gliese 581系统的行星轨道与太阳系的比较图。
Space agencies are identifying hundreds of planets outside our solar system that could harbour life.
人类的空间科学机构正在识别太阳系之外，可能存在生命的数百个行星。
But these are the first images of planets outside the Solar System, or exoplanets as they are called.
但是这些是被称之为“系外行星”——太阳系以外行星的第一批图像。
There are many conditions but out of those trillions of planets, could one have formed as Earth did?
环境条件多种多样，但在数千万亿颗行星当中会不会有一颗像地球那样形成？
Its vast catalogs will help answer fundamental questions about the origins of planets, stars and galaxies.
它浩大的编目将帮助解答关于原始行星、恒星和星系的基本问题。
Star formation is vital to galaxy evolution and the production of planets, both inhabited and uninhabited.
恒星的形成对星系的演化很重要，对行星的产生也很重要——包括适宜人居住的或者不适宜人居住的行星。
Astronomers have discovered hundreds of planets beyond our solar system, but they know very little about them.
天文学家们业已在我们的太阳系外发现了数百颗行星，但是关于这些行星他们了解得非常少。
The finding comes from simulations to show how orbits of planets might evolve billions of years into the future.
这一发现源自显示未来数十亿年中行星轨道会如何演变的模拟计算。
It has already spotted hundreds of planets outside the Solar System, although full data have not yet been released.
这个望远镜已经发现的太阳系外的几百个行星，虽然完整的数据尚未公布。
If the orbits of planets are not edge-on to observers on Earth, the technique underestimates the masses of the planets.
如果行星的轨道对于地球上的观测者来说并不是边缘向前的，这项技术会低估行星的质量。
And so the limits of Darwinian evolution will define the range of planets that can support life - at least Earth-like life.
因此，这种理论提出的各种限制条件将确定哪些行星可支撑生命——至少是类地生命。
As a result, the catalogue of planets is filled with "hot Jupiters", huge bodies baking brightly in the light of their sun.
结果，行星编录上尽是短周期气体巨行星，这些行星被它们的太阳烤得火亮火亮。
This photo-manipulation has a very unique look with the sky of planets, sun on the grass and a dreamy look on the building itself.
这幅插图上空的星球、草地上的阳光、城堡本身的虚幻感，无不让它看上去独一无二。
So the simulation tested different initial arrangements of planets to see which would evolve into the solar system we know so well.
所以，该模拟测试了行星各种不同的开始布局，以便发现哪一种布局可以演变成我们所熟知的太阳系。
Meanwhile, the sizes and orbits of planets already discovered are revolutionizing researchers' understanding of how planetary systems form and evolve.
同时，这些新发现行星的体积和轨道彻底改变了科学家对行星系形成和进化过程的认识。
Not only can scientists now identify what types of planets exist, they can see how common each type is, yielding clues into the enigmas of planetary formation.
现在科学家不仅能识别行星的存在形式，还能够了解每种类型的数量，找出行星构造之谜的线索。
So, what happened back then was Kepler was trying to observe the motion of planets in the sky, and trying to come up with general explanations of how they move.
在那时候，开普勒尝试观察天上行星的移动，并尝试提出它运动的理论。
Most models of planets assume that they are similar to the terrestrial planets in our own Solar System, with about half as much carbon as oxygen in the atmosphere.
而多数行星模型均假设它们和我们太阳系的类地行星相似，即在大气中碳含量是氧含量的一半左右。
They don't wander the galaxy looking for tasty snacks in the form of planets and stars; they orbit the Milky Way just like the hundreds of billions of other stars do.
它们并未以行星和恒星的形式在星系中漫游，寻找可口的小吃，而是像数百亿其它恒星那样环绕银河系运行。
They don't wander the galaxy looking for tasty snacks in the form of planets and stars; they orbit the Milky Way just like the hundreds of billions of other stars do.
它们并未以行星和恒星的形式在星系中漫游，寻找可口的小吃，而是像数百亿其它恒星那样环绕银河系运行。
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