| 单词 | longitude star |
| 释义 | > as lemmaslongitude star longitude star n. now rare any of various bright stars formerly used to determine terrestrial longitude on the basis of their relative position with respect to that of the moon. ΘΚΠ the world > the universe > star > kind of star > stars that show the way > [noun] > navigation aid sea-starc1050 longitude star1814 Greenwich star1821 lunar star1840 moon-culminator1846 nautical star1867 1814 P. Barlow New Math. & Philos. Dict. Longitude stars, is a term frequently used to denote those fixed stars which have been selected for the purpose of finding the longitude by lunar observations. 1856 G. W. Dean in Rep. Superintendent Coast Surv. 1856 (U.S. Coast & Geodetic Surv.) ii. xxii. 171 The following copy of a portion of the longitude star list, which was used in the Macon and Montgomery telegraph campaign of this season. 1901 S. G. Burrard Great Trigonometrical Surv. India XVII. ii. 150 The weather however at both stations was broken and cloudy which rendered the longitude stars liable to fail. 1994 A. H. Grundy Britain's Prehistoric Achievements ii. 28 If the gauging star (or longitude star) is selected one evening on the horizon just after sunset, level with the Moon, it does not appear level with the Moon the next night until an hour after sunset. < as lemmas |
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