The planet is one of 119 known extra-solar planets, objects that orbit stars other than the sun.

这是119颗太阳系外行星中的一颗。这些行星围绕除太阳外的其他星体运行。

《柯林斯英汉双解大词典》

But Smith dismissed the claims, insisting that other extra-solar planets differ starkly from our own and that even if they did support life, it would not be possible for humans to make contact.

不过史密斯否定了类似的观点，坚称太阳系以外的行星和我们的星球迥然不同，即使它们适合生命生存，人类和这些生命取得联系也是不可能的。

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At -201C, it is one of the coldest extra-solar planets to be discovered.

BBC: NEWS | Science/Nature | Planet hunters find 'super-Earth'

The discovery of a dozen of these extra-solar planets in the past three years in no way diminishes astronomers' delight in each new discovery.

CNN: Astronomers spy new neighbors outside solar system