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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Our solar system is surrounded by a vast collection of icy bodies called the Oort Cloud.

我们的太阳系被一大片冰体物质所包围，这就是所谓的欧特云团(Oort Cloud)。

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This is still well within the Oort cloud, whose boundary is estimated to be beyond 50,000 AU.

据估计，奥尔特云的边界应在50,000天文单位外，因此该天体依然位于奥尔特云内。

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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.

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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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