单词	protoplanet
释义	protoplanet /ˈprəʊtəʊˌplanɪt / noun Astronomy A large body of matter in orbit around the sun or a star and thought to be developing into a planet: this analysis supported the view that the moon originated from a glancing collision between the earth and another protoplanet 4,500 million years ago... Learning more about the protoplanet won't be fast or easy. The protoplanet candidate orbits about 70 times further from its star than Earth does from the Sun. It isn't clear how the latest suspected protoplanet is being formed. Origin 1940s: from proto- + planet.
随便看	nodden nodder nodding acquaintance nodding dog nodding donkey nodding lily noddingly nodding terms nodding thistle noddle noddy noddy-board Noddy suit node no-decision noded node of Ranvier nodhead nodical no dice nod off nodosarine nodosaur nodosaurid Nodosaurus

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