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…
| 单词 | θ208034 |
| 释义 | society > travel > air or space travel > a means of conveyance through the air > spacecraft > parts of spacecraft > [noun] > device for maintaining orientation (3) bubble sextant1919 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… sun-seeker1948 A photoelectric device used in a satellite, spacecraft, etc., which maintains its orientation with respect to the sun and can be used to direct… star tracker1949 a device which automatically establishes and maintains an orientation relative to a star, used in spacecraft, missiles, space telescopes, etc. |
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