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 | θ1520 |
| 释义 | the world > the universe > cosmology > science of observation > [noun] > taking of altitudes > result (1) observation1882 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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