| 单词 | magnetic zenith |
| 释义 | > as lemmasmagnetic zenith magnetic zenith n. the point of the sky directly above the magnetic pole of the earth, esp. as the focal point of an aurora. ΘΚΠ the world > the universe > celestial sphere > [noun] > zenith > magnetic magnetic zenith1837 1837 Ann. Rep. Regents Univ. State N.Y. 165 The ‘merry dancers’ were seen faintly flashing up from the horizon to the magnetic zenith. 1885 S. Tromholt Aurora Borealis I. x. 221 The Auroral Corona..is produced by the streamers shooting from every part of the sky towards a common point, viz., the magnetic zenith. 1950 Science 17 Nov. 590/1 A spectrum of an auroral arc in the magnetic zenith..showed that the H-alpha emission line is strongly asymmetric to the violet. 2014 Jrnl. Atmospheric & Solar-Terrestr. Physics 107 9/1 The cameras were directed towards the magnetic zenith. < as lemmas |
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