transferred. Applied to the two large nebulæ (Magellanic Clouds) near the south pole of the heavens; and to the ‘coal-sack’ (Black Magellanic Cloud…
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| 单词 | θ1228 |
| 释义 | the world > the universe > constellation > nebula > [noun] > dark nebula > coal-sack (3) cloud1694 transferred. Applied to the two large nebulæ (Magellanic Clouds) near the south pole of the heavens; and to the ‘coal-sack’ (Black Magellanic Cloud… coal sack1844 Astronomy. A dark nebula giving the appearance of a gap in the stars of the Milky Way; spec. (usually the Coal Sack) one near the Southern Cross… black hole1876 Astronomy. A circumscribed region of the sky seemingly devoid of visible stars; = coal sack, n. 2. Cf. vacuity, n. 8b. |
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