它是格利泽581g，它在一颗恒星附近。
更好的是，它处在其星系的宜居带以内，围绕恒星格利泽的轨道距离适中，液态水足以存在。
Better still, it's located in what's known as a habitable zone, orbiting Gliese at just the right distance to have liquid water.
格利泽581是一颗红矮星距离地球20.5光年。
格利泽的系统尤为使我们感到兴奋，因为它距离地球很近，在将来利用天文望远镜，我们或许就能直接关发到这个星球上是否有生命的存在。
'The Gliese system is particularly exciting to us as it's very close to Earth, relatively speaking. So with future generations of telescopes, we'll be able to search for life on Gliese 581d directly.
格利泽 581c被确认是另一个“超级地球”，科学家在2007年首次发现它的时候，一度以为它有条件承载生命。
When scientists first discovered Gliese 581 c, another confirmed super-Earth, in 2007, they thought the planet was, just possibly, capable of hosting life.
所有这些因素使得格利泽 581 g（译注：原文为格利泽，应是格利泽 581 g之误）最有希望成为地球类行星并不稀有的明证。
All of these factors add up to make Gliese the most promising evidence yet that Earth-like planets may not be such a rarity after all.
一颗在格利泽581恒星系统内的叫做格利泽581d行星，可能是已知的最适于居住的外行星。
One of the several planets within the Gliese 581 star system, called Gliese 581 d, may be one of the most potentially habitable alien worlds known.
不过也还好，格利泽 581c 上面一年只有13天，我们去那里的话买日历就能把人买穷了[来源:Sample]。
That may be for the best, though; a year on Gliese 581 c lasts just 13 days, so we'd have to spend a fortune on calendars [source: Sample].
我们现在知道这颗行星的轨道超出了宜居带一点，因此，格利泽 581c 的表面很可能太热而无法存在液态水。
We now know that the planet's orbit is slightly outside of the habitable zone and that, as a result, Gliese 581 c's surface is likely too warm to have liquid water.
不幸的是，接下来的研究消退了对格利泽581c的热情。
Unfortunately, subsequent research has tempered the initial excitement over Gliese 581 c.
科学家们对于这项发现感到非常意外，因为在此前格利泽 581d一直被排除在适宜居住的星球之外。
Scientists were surprised by the discovery because Gliese 581d was previously ruled out as a habitable planet candidate.
今年五月，法国天文学家发现宜居行星“格利泽581d”，该行星比“开普勒22b”要近得多，距离地球约20光年。
In May, French astronomers identified Gliese 581d, pronounced “gleezer”, which is far closer at around 20 light years away.
这颗名为格利泽581d的外部星提供了可供生命存在所需的条件，在格利泽上可能存在有类似于谁的海洋和降雨。
The 'exoplanet' Gliese 581d has conditions that could support Earth-like life, including possible watery oceans and rainfall.
这两颗行星都围绕格利泽581恒星转动，因此他们被称作格利泽581d和格利泽581c。
Previously discovered planets have had masses more akin to Jupiter's. The planets orbit the same star and are known as Gliese 581c and Gliese 581d.
这两颗行星都围绕格利泽581恒星转动，因此他们被称作格利泽581d和格利泽581c。
Previously discovered planets have had masses more akin to Jupiter's. The planets orbit the same star and are known as Gliese 581c and Gliese 581d.
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