Astronomy. The point on the celestial sphere diametrically opposite to the zenith, and directly below the observer.
| 单词 | θ169 |
| 释义 | the world > the universe > celestial sphere > [noun] > opposite point > nadir (2) nadir1496 Astronomy. The point on the celestial sphere diametrically opposite to the zenith, and directly below the observer. imum coeli1585 The point on the celestial sphere diametrically opposite to the zenith, the nadir (nadir, n. 2a); (also, more commonly) the lowest point on the… |
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