| 单词 | bubble sextant |
| 释义 | > as lemmasbubble sextant bubble sextant n. a sextant in which a bubble contained in a fluid-filled tube, rather than the horizon, is used as a point of reference from which measurements of the angular distance between a celestial object and the horizontal plane can be made. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > spacecraft > parts of spacecraft > [noun] > device for maintaining orientation bubble sextant1919 sun-seeker1948 star tracker1949 1919 Publ. Astron. Soc. Pacific 31 143 The bubble sextant appears to leave very little to be desired as an instrument for aerial navigation. 2014 Times (Nexis) 31 July (Obituaries) 51 Van Kirk shot star sights by bubble sextant from a dome on top of the aircraft. < as lemmas |
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