作者: Stephen G. Brush
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摘要: Attempts to find a plausible naturalistic explanation of the origin solar system began about 350 years ago but have not yet been quantitatively successful. The period 1956- 1985 includes first phase intensive space research; new results from lunar and planetary exploration might be expected played major role in development ideas formation. While this is indeed case for theories moon (selenogony), it was true general, where ground-based observations (including meteorite studies) were frequently more decisive. During most theorists accepted monistic scenario: collapse gas-dust cloud form sun with surrounding disk, condensation that disk planets, seen as part single process. Theorists differed on how explain distribution angular momentum between whether planets formed directly by gaseous protoplanets or accretion solid planetesimals, "solar nebula" ever hot turbulent enough vaporize completely mix its components, an external cause such supernova explosion "triggered" initial cloud. Only selenogony tentative consensus reached working hypothesis quantitative results.