| 单词 | nebular hypothesis |
| 释义 | > as lemmasnebular hypothesis nebular hypothesis n. [coined by William Whewell (see quot. 1833 at main sense)] the hypothesis (originally propounded by Kant in 1755 and elaborated by Herschel and Laplace) that the solar system originated as a diffuse rotating cloud of gas which under its own gravitational attraction contracted into a flattened disc from which the planets condensed (now viewed as the most likely origin of the solar system and other star systems). ΘΚΠ the world > the universe > cosmology > science of observation > theory > [noun] > system of astronomy > specific Newtonianism1814 Ptolemaism?1832 nebular hypothesis1833 nebular theory1846 Copernicanism1858 nebulous theory1860 nebula hypothesis1892 Velikovskyism1972 Velikovskianism1978 1833Nebular hypothesis [see main sense]. 1841 Biblical Repertory Jan. 155 The cosmogony which he [sc. J. P. Nichol] adopts, which is nothing more than the nebular hypothesis of La Place, cannot yet be received as positive truths of science. 1877 Nature 13 Sept. 414/1 The nebular hypothesis..remains untouched by these observations. 1931 H. S. Williams Bk. Marvels 90 The basis for this assumption is the nebular hypothesis, according to which the various planets were thrown off in succession from the mass of world-stuff which contacted as it cooled. 1996 Nature 21 Nov. 228/1 Problems with the nebular hypothesis late last century led to the tidal hypotheses of Chamberlin and Moulton, and those of Jean and Jeffreys. < as lemmas |
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