譬如说今日的(左上图)，气体巨型星海王星的重力通过对轨道就在行星们不远处的柯伊伯带的结冰尘埃和残骸拉扯制造出数个缺口。
Today (top left), for example, the gravity of the gas giant Neptune creates gaps by tugging at the icy dust and debris of the Kuiper belt, which orbits just beyond the 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。
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.
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。
Pluto, Eris and the many other Kuiper Belt objects are far too different to be lumped in with the eight official planets, he said.
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