单词 | protomoon |
释义 | > as lemmasprotomoon protomoon n. Brit. , U.S. , ΚΠ 1954 Proc. National Acad. Sci. U.S.A. 40 1109 The origin of the bodies that struck the moon and formed the craters..may be thought to be one of these four possibilities: (1) they formed inside ‘protomoon’, or rather from condensations in the inner part of the earth-moon cloud; [etc.]. 2004 New Scientist 14 Aug. 27/2 Theia's iron core sank into the Earth, while its molten rock layers splashed out into space. Once in orbit, the splattered pieces were pulled together by gravity to form a protomoon. < as lemmas |
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