| 单词 | celestial horizon |
| 释义 | > as lemmascelestial horizon a. Astronomy. A great circle of the celestial sphere, the plane of which passes through the centre of the earth and is parallel to that of the sensible horizon of a given place: distinguished as the astronomical horizon, celestial horizon, mathematical horizon, rational horizon, real horizon, or true horizon.right horizon: see right adj. and int. Compounds 2. oblique horizon: see oblique adj. 2a. geographical horizon, the great circle on the earth's surface in the plane of the rational or astronomical horizon. ΘΚΠ the world > the universe > celestial sphere > circle of celestial sphere > [noun] > great circle > horizon horizonc1400 finitor1594 rational horizon1599 c1400 ( G. Chaucer Treat. Astrolabe (Cambr. Dd.3.53) (1872) Prol. 1 A suffisaunt astralabie as for owre orizonte, compowned after the latitude of Oxenford. c1400 ( G. Chaucer Treat. Astrolabe (Cambr. Dd.3.53) (1872) ii. §26. 37 This forseid rihte orisonte..diuideth the equinoxial in-to riht Angles. c1550 Complaynt Scotl. (1979) vi. 39 There is tua sortis of orizons ane is callit the rycht orizon the tothir is callit the oblique orizone. 1559 W. Cuningham Cosmogr. Glasse 39 The vj. great circles of the Sphere ar, as the Horizont, the Meridian, th' Equinoctiall, the Zodiake, the Equinoctiall and solsticiall Colures. 1634 T. Herbert Relation Some Yeares Trauaile 8 For the Æquator is Horizon to both Poles. 1704 J. Harris Lexicon Technicum I. (at cited word) The Rational, Real or True Horizon, is a Circle which encompasses the Earth exactly in the Middle, and whose Poles are the Zenith and Nadir. < as lemmas |
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