| 单词 | zenith telescope |
| 释义 | > as lemmaszenith telescope zenith telescope n. an astronomical telescope designed to point vertically up to the vicinity of the zenith, used in the precise determination of star positions, astronomical latitude, and the orientation of the earth's poles. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical instruments > zenith distance > [noun] zenith sector1775 zenith telescope1803 zenith tube1825 1803 T. Cavallo Elements Nat. or Exper. Philos. IV. 268 The principal instruments for a fixed observatory, are..a fixed zenith telescope, and a night telescope. 1938 W. S. Downs Encycl. Amer. Biogr. New Ser. 364/1 In 1910..an order was given Mr. Gaertner for the construction of a Photographic Zenith Telescope. 2007 A. T. Tokunaga & R. Jedicke in L.-A. McFadden et al. Encycl. Solar Syst. (ed. 2) xxxix. 724/1 The only large telescope to date that uses a fixed mount..is the Large Zenith Telescope, and it uses a liquid mercury mirror. < as lemmas |
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