Astronomers expect yet-undiscovered Kuiper Belt objects may rival even Pluto.

天文学家预计柯依伯带中可能会发现比冥王星大的天体。

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Pluto, Eris and the many other Kuiper Belt objects are far too different to be lumped in with the eight official planets, he said.

冥王星、厄里斯和许多其他柯伊伯带的天体对于八大行星来说太不同了，无法归为一类，他说。

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A decade ago, when he and the Hayden staff redesigned the planetarium's exhibits, they lumped Pluto with the Kuiper Belt objects rather than with the eight official planets.

十年前，当他和海登天文馆的成员们重新设计馆内展品时，他们把冥王星划入了柯伊伯带天体的集团中，还不是与八大行星在一起。

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The researchers say this dust must be coming from collisions among small bodies similar to the comets or icy bodies that make up today's Kuiper Belt objects in our solar system.

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Mr. STERN: So a few weeks after the Pluto encounter when we've chosen our target, we'll fire the engines of the spacecraft, but we'll have to fly a distance something like from here to the sun or twice that far to reach these Kuiper Belt objects.

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Unlike the larger Kuiper-belt objects, comet-sized ones would be too faint to show up in a single photograph even one taken by the mighty Hubble.

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