宜居类地行星

A habitable terrestrial planet

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1
但是Gliese 581e和Gliese 581d这两颗类地行星的发现勾起了公众无穷的想象力，它们都位于Gliese 581的轨道之上，而且处于宜居带中。
But the discovery of Earth-like planets around Gliese 581 - both 581e and 581d, which was in the habitable zone - has also caught the public imagination.
2
根据“宜居区”边界限定对这些“地球2.0版”候选行星做重新确认，类地行星的候选数量下降到了48个。在不久的将来，可能会有更多的类地行星得到证实。
More of these "Earth 2.0" candidates are likely to be confirmed in the near future, though a redefinition of the habitable zone's boundaries has brought that number down to 48.

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