The dwarf planet Ceres, once considered the largest asteroid, has a diameter roughly one-fourth that of the moon.

这颗曾被视作最大小行星的矮行星谷神星，直径约为月球的四分之一。

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It is just weeks since Pluto was redefined a dwarf planet.

自冥王星被重新定义为矮行星不过几周.

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It is just weeks since Pluto was redefined as a dwarf planet.

冥王星被重新定义为矮行星仅仅过去几周.

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Scientists will probably find many more dwarf planets.

或许,科学家们还会发现更多的矮行星.

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What is a dwarf planet?

甚麽是矮行星?

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