translation.en: Afterwards, the big planets like Jupiter and Saturn, they were not in their place where they are now, and they interacted gravitationally, and they swept the whole interior of the solar system clean, and what we now know as comets ended up in something called the Kuiper Belt, which is a belt of objects beyond the orbit of Neptune.
translation.zh: 然后，像木星和土星这样的大行星， 它们当时并不在今天所处的位置， 它们会通过引力相互作用， 并将整个太阳系内部打扫干净了， 而我们现在称为彗星的天体 最终到了一个叫做“柯伊伯带”的地方， 这是一个海王星轨道以外的天体聚集带。