冥王星唯一的卫星卡戎，大小是冥王星的一半。

Pluto has a moon, Charon, half the size of the planet.

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两颗相似大小的行星在模拟低速碰撞中产生了冥王星和卡戎，还有可以形成尼克斯和许德拉的并碎屑。

A simulated low-speed crash between comparably sized planetoids yields a Pluto and a Charon, plus an icy debris disk that could coalesce into a Nix and a Hydra.

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直到去年，科学家还认为冥王星只有一颗卫星卡戎。

Until last year, scientists thought Pluto was accompanied by only one moon, Charon.

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直到去年，科学家还认为冥王星只有一颗卫星卡戎。

Until last year, scientists thought Pluto was accompanied by only one moon, Charon.

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