| 单词 | angle of position |
| 释义 | > as lemmasangle of position angle of position n. [after post-classical Latin angulus positionis (1533 in Gemma Frisius Libellus de Locorum Describendorum Ratione; compare quot. 1559)] the angle between the direction of a point and some other direction regarded as fundamental; spec. (a) the angle formed at the eye by the lines of sight of two points; †(b) Astronomy the angle between the circles of declination and latitude of a celestial object (obsolete. rare); (c) Astronomy the angle between the hour-circle passing through a celestial object and the great circle joining that object to another celestial object (also called position angle); (Geography) the angle between the meridian of a place and the great circle passing through that place and another place. ΘΚΠ the world > the universe > heavenly body > position of heavenly body > [noun] > other declinationc1400 meridian altitudec1400 angle of position?a1560 zenith distance1588 refraction1603 azimuth1626 amplitude1627 horizontal parallax1665 complement1703 aberration1737 hour-angle1837 intercept1901 the world > the universe > heavenly body > position of heavenly body > [noun] > position angle angle of position1812 position angle1862 1559 W. Cuningham Cosmogr. Glasse 137 Directe the ruler with hys two sightes vnto anye one place that you do see, & marke diligently the Angle of sight, (Gemma Frisius calleth it) Angulus positionis.] ?a1560 L. Digges Geom. Pract.: Pantometria (1571) i. xxviii. sig. H iv Notyng vppon youre slate the angle of position from the dimetient to the lyne fiduciall. ?a1560 L. Digges Geom. Pract.: Pantometria (1571) i. xxxiv. sig. K iij v Turne the Diameter of your Semicircle, to euery Towne, Village, Hauen, Rode, or suche like,..noting..the Degrees cut by the Alhidada in the Circle, which I call the Angles of Position. 1812 R. Woodhouse Elem. Treat. Astron. viii. 58 When through a Star great circles are drawn respectively from the poles of the equator and ecliptic, they form at the Star an angle called the Angle of Position. 1848 Southern Literary Messenger Jan. 8/1 The plan..contemplates measures of distance and angle of position upon all double and multiple stars. 1875 Times 11 Mar. 4/5 The slightest astronomical error in the angle of position would have thrown Venus entirely out of the field of view of the telescope. 1908 Van Wert (Ohio) Daily Bull. 28 Nov. 3/5 [At the forthcoming eclipse] the angle of position of point of nearest approach [of the moon] will be twelve degrees to the West from the North point. 1991 Jrnl. Physics G. 17 991 θ is the azimuthal angle of position..to the galactic centre. < as lemmas |
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