spec. The measurement of the altitude of the sun (or other celestial object) by means of an astronomical instrument, in order to ascertain…
| 单词 | θ1531 |
| 释义 | the world > the universe > cosmology > science of observation > observe [verb (intransitive)] > ascertain latitude or longitude (1) to work an observation1669 spec. The measurement of the altitude of the sun (or other celestial object) by means of an astronomical instrument, in order to ascertain… |
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