For habitable planets orbiting brighter, hotter stars, the search will take longer.

对于寻找适合居住的绕着更亮，更热的恒星转的行星，将会搜寻更长时间。

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It can automatically search for habitable planets in space and take the human to the planet.

它可以自动查找太空中适合人类居住的星球并带人类去那个星球。

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Scientists hope that Kepler could find dozens of habitable planets during its three-to-four-year mission.

科学家们希望开普勒在其为期3至4年的使命中，能找到几十个适合居住的行星。

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"We now know the rate of occurrence of habitable planets around the most common stars in our galaxy, " said Prof Charbonneau.

BBC: Exoplanets near red dwarfs suggest another Earth nearer

Kepler is designed to find out how common habitable planets are, but its target stars are too distant for their planets to be studied directly.

ECONOMIST: Extra-terrestrial life

Seager called the discovery of the three planets "a huge milestone, " but her excitement is tempered because potentially habitable planets have been announced in the past and there's currently no way to get more details, given how far away they are.

CNN: 3 new planets could host life