The Oort Cloud is thought to extend about 1 light year from the Sun.

欧特云团距太阳1光年距离。

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The other six hail from the Oort Cloud more than 5, 000 times farther out.

其他六个产生于又远出5000多倍的奥尔特星云。

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A Nasa graphic which illustrates how the Oort Cloud surrounds our solar system.

这幅美国宇航局的图示说明了奥特云如何包围着我们的太阳系。

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The galaxy's tidal wobble is, they think, being modulated by the gravity of something big within the Oort cloud itself.

ECONOMIST: X marks the spot

Only when a comet arriving from the Oort cloud has its orbit tweaked by a close encounter with a planet does it settle into a more regular existence.

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Whitmire notes that Sedna, thought by some to be an inner Oort Cloud object, may have also been perturbed by Tyche, since Sedna has an orbit well beyond that of Neptune.

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