| 释义 |
nebular, a. Astron.|ˈnɛbjʊlə(r)|
[f. prec. + -ar1: cf. F. nébulaire.]
1. nebular hypothesis or nebular theory, the theory, propounded by Kant and elaborated by Herschel and Laplace, which supposes a nebula to be the first state of the solar and stellar systems.
1837Whewell Hist. Induct. Sci. (1857) II. 229 The Nebular Hypothesis, which has been propounded by Laplace. 1871Tyndall Fragm. Sci. (1879) II. x. 211, I hold the nebular theory, as it was held by Kant. 1877Lockyer in Nature XVI. 414/1 The nebular hypothesis..remains untouched by these observations.
2. Consisting of, concerned with, or relating to a nebula, or to nebulæ.
1856Page Adv. Text-bk. Geol. ii. 21 Such hypotheses, then, as nebular condensation. 1878Newcomb Pop. Astron. iv. ii. 480 On each side of the galactic and stellar region we have a nebular region. 1892A. Taylor in Photogr. Ann. II. 117 Nebular, lunar, and planetary photography. |