exoplanets

Most known exoplanets have been discovered by indirect means, but planetary scientists believe they can learn a lot more from direct observation.

众所周知，系外行星是通过间接方式发现的，但是行星科学家们相信，通过直接观测会了解到更多。

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Compared with other exoplanets, its mass is quite small, only about twice that of Earth.

和其他的外星星球相比，它的质量很小，只是地球的两倍。

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As the paper points out, enough exoplanets have now been found for statistical patterns to emerge.

正如论文指出，目前发现的系外行星已经足够让人们做出一幅行星分布统计图。

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The world is one of three tentatively identified new exoplanets orbiting the star HD 40307.

经初步确认有三个绕着恒星HD40307转动的系外行星，而新发现的星球也是其中一员。

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That allows astronomers to directly observe exoplanets, even though the star is thousands or even millions of times brighter.

这就使天文学家能够直接观测系外行星，尽管恒星比行星要亮一千倍甚至上百万倍。

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And the study of exoplanets have been getting more and more exciting, hundreds of them have been discovered so far.

对外星星球的研究正变得越来越令人兴奋，目前为止已经发现好几百个了。

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It could also help illuminate how giant, gaseous exoplanets often come to orbit their parent stars so closely.

还有助于说明，巨大的气态外部行星如何这么近地围绕起源恒星的轨道运行。

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Exoplanets are great discoveries in the last century in the field of astronomy.

系外行星是上世纪末天文学领域的一个重大发现。

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It should be capable of detecting exoplanets smaller than the Earth.

这架望远镜能够侦测到体积比地球还小的系外行星。

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Compared with the stars theyorbit, exoplanets are faint and difficult to spot directly.

相对于恒星来看，围绕其运行的系外行星比较微弱，科学家们很难直接探测到它们。

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The Kepler space telescope has discovered more than 130 exoplanets in our galaxy.

开普勒望远镜已经发现了银河中超过130颗行星。

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More than 500 exoplanets have been discovered since then, yet its not clear if even one of them might be habitable.

这二十多年来，人类已陆续发现了500多个太阳系外行星，但这些行星是否适合居住仍不得而知。

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But for astronomers studying exoplanets or extreme astrophysics, the new projects represent two more eyes on the sky.

但对于正在研究系外行星和极端天文物理现象的天文学家来说，这两个项目代表着两只监视天空的眼睛。

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Most of the exoplanets we've found are much larger than Earth, usually around the size of Jupiter.

目前我们所发现的大多数系外行星都比地球要大，大小一般和木星差不多。

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Most of the exoplanets discovered so far are much closer to their host stars than the ice line.

至今所发现的系外行星中，大多行星同主星的距离小于冰线。

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Among these eight, astronomers say there are two that are the most similar to Earth of any known exoplanets to date.

天文学家说，在这8个行星中，有两个是迄今已知所有外行星中和地球最像的。

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There are now three planets outside the system, known as exoplanets, which experts believe could potentially be colonised by future generations.

目前太阳系外有三颗“系外行星”被专家认为人类未来可能移居。

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They point out that similar objections were raised against the idea of looking for exoplanets in the first place.

他们指出，当初寻找外星球的想法也曾遇到过类似的反对理由。

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Some are just geeky, like a bot that describes imaginary exoplanets.

有一些机器人只是比较呆，比如有的机器人账号会描绘虚构的系外行星。

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The researchers also discovered more signals of exoplanets in the system.

研究人员还在星系中发现了更多系外行星的信号。

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Similar scrutiny of actual exoplanets may one day reveal the first good suspects for harboring life-via their light.

这种对系外行星反照光的类似分析也许有一天能够找到其它暗藏生命的行星。

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It has been designed to spot exoplanets bigger than twice the size of the Earth.

这艘太空船是用以捕捉体积在地球两倍以上的系外行星的踪影。

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That kind of view could reveal exoplanets changing color with the seasons, suggesting the presence of vegetation.

通过如此高清的图像呈现，人们可以观测到外星行星随着季节而呈现出不同颜色，也可以检测到植物的存在。

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Well, today I'd like to turn to what are called exoplanets and how researchers detect them.

那么，今天我想把话题转向外星星球，以及研究人员是如何探测到它们的。

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Student: So, uh, exactly why are we interested in these exoplanets anyway?

学生：那么我们究竟为何对这些外星星球这么感兴趣呢？

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Student: Exoplanets are planets that orbit around a star other than our Sun, right?

学生：外星星球就是那些环绕着一颗不同于我们的太阳的恒星运行的星球，对吧？

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How can we search for life on exoplanets?

我们怎样寻找（太阳）系外行星上的生命？

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As many as300 so called exoplanets or planets outside our solar system have been discovered, but most are much larger than Earth.

已经发现了多大300颗所谓的”外星球“，或者是太阳系之外的星球，可是多数都比地球大许多。

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Both are the smallest exoplanets ever found in their stars habitable zones.

这两颗行星是在它们恒星周围的的宜居区中所被发现的最小的系外行星。

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For one thing, studying these exoplanets will be relatively easy because of how they rotate around their star.

首先，因为它们围绕恒星旋转，研究这些地外行星也就相对容易。

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