Croswell believes we should define a planet simply - as something that goes around the sun and has the diameter of Pluto or more.
克罗斯维尔认为，我们对行星的定义应当简化，即行星是一种周期性围绕太阳旋转的星体，其直径不应小于冥王星的直径。
Croswell believes we should define a planet simply - as something that goes around the sun and has the diameter of Pluto or more.
克罗斯维尔认为，我们对行星的定义应当简化，即行星是一种周期性围绕太阳旋转的星体，其直径不应小于冥王星的直径。
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