Pluto is now considered a dwarf planet dwelling in the Kuiper belt.

冥王星现在被认定为一颗处于柯伊伯带中的矮行星。

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They used the Herschel space telescope to examine Comet Hartley 2, which originated in the Kuiper Belt.

他们使用赫歇尔太空望远镜来观测哈特利2号，这颗来自柯伊伯带【2】的彗星。

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Either way, it's the first time astronomers have observed this kind of surface detail on an object in the Kuiper Belt.

无论如何，这是科学家第一次在柯伊伯带天体上发现这种表面特征。

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But there is reason to believe that comets are what the Kuiper belt mostly consists of.

ECONOMIST: Unbuckling the Kuiper belt

This would make sense if short-period comets started off in the Kuiper belt and were nudged into closer orbits around the sun by the gravity of the most distant of the giant planets, Neptune.

ECONOMIST: Unbuckling the Kuiper belt

But the forces exerted by objects in the Kuiper belt (a collection of small bodies orbiting the sun beyond the orbit of Pluto), or by the galaxy as a whole, were also far too weak to be responsible.

ECONOMIST: A space oddity