余下的八大行星为：水星、金星、地球、火星、木星、土星、天王星和海王星。
Eight planets officially remain: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
在接下来的几百万年间，盘状物中的几块粘在一起形成了现代太阳系所熟悉的八大行星。
During the next few million years, lumps of that disk stuck together to form the familiar eight planets of the modern solar system.
冥王星、厄里斯和许多其他柯伊伯带的天体对于八大行星来说太不同了，无法归为一类，他说。
Pluto, Eris and the many other Kuiper Belt objects are far too different to be lumped in with the eight official planets, he said.
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