由于重力对所有物质的作用是相等的,因此不均匀的地方会被向下拉。表面使其本身变得平均。唯一一个表面上的每个角到中心距离都相等的几何物体就是球体。
But wait a minute,I've seen pictures of asteroids that have all sorts of crazy shapes.Why aren't they round? Only because they aren't big enough for gravity to be a determining factor. If an asteroid were to suddenly become as big as a moon, it would indeed rearrange itself gradually into a sphere.
等一下,我看过很多行星的图片,它们都是奇形怪状的。它们为什么不是圆的?那只是因为行星太小,重力不能成为其决定因素。如果行星突然变得和月亮一样大,它就会真正重新安排逐渐变成一个球体。
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