英语词汇“zenith point”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

zenith point n. the point on the celestial sphere directly overhead at a particular location; = sense A. 1a.

ΘΚΠ

the world > the universe > celestial sphere > circle of celestial sphere > [noun] > great circle > azimuth circle > zenith point

zenithc1400

zenith point1585

1585 J. Blagrave Math. Iewel ii. xvi. The Azimuthes..are those which are drawne cutting all the almicantares meeting altogither at one point..: which point I call the zenith point of the reete.

a1652 S. Foster Elliptical Horologiography (1654) 63 Only in North Declinations the Equinoctiall goes nearer the Zenith point, in South it goes further of.

1829 W. Pearson Pract. Astron. II. 531 The zenith sector..can be used only on the meridian; and its measures are referred to the zenith point of the place of observation.

1950 Techn. Data Digest Jan. 7/3 From the known positions of the star images in the celestial sphere, the co-ordinates of the zenith point may be computed.

2011 P. Duffet-Smith & J. Zwart Pract. Astron. with Calculator (ed. 4) xviii. 35 The observer..is at O and the plane containing the circle NESW is again the horizon with Z the zenith point.

单词	zenith point
释义	> as lemmas zenith point zenith point n. the point on the celestial sphere directly overhead at a particular location; = sense A. 1a. ΘΚΠ the world > the universe > celestial sphere > circle of celestial sphere > [noun] > great circle > azimuth circle > zenith point zenithc1400 zenith point1585 1585 J. Blagrave Math. Iewel ii. xvi. The Azimuthes..are those which are drawne cutting all the almicantares meeting altogither at one point..: which point I call the zenith point of the reete. a1652 S. Foster Elliptical Horologiography (1654) 63 Only in North Declinations the Equinoctiall goes nearer the Zenith point, in South it goes further of. 1829 W. Pearson Pract. Astron. II. 531 The zenith sector..can be used only on the meridian; and its measures are referred to the zenith point of the place of observation. 1950 Techn. Data Digest Jan. 7/3 From the known positions of the star images in the celestial sphere, the co-ordinates of the zenith point may be computed. 2011 P. Duffet-Smith & J. Zwart Pract. Astron. with Calculator (ed. 4) xviii. 35 The observer..is at O and the plane containing the circle NESW is again the horizon with Z the zenith point. extracted from zenithn.adj. < as lemmas
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