a dark area on the sun's disk; = sunspot, n. 2.
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| 单词 | θ901 |
| 释义 | the world > the universe > sun > solar activity > [noun] > mark on sun > sunspot (12) sun's spot1656 a dark area on the sun's disk; = sunspot, n. 2. macula1673 Astronomy. A dark spot or patch on the surface of the sun or other celestial object. Now chiefly used with reference to Europa, the satellite of… nebula1676 Astronomy. A hazy sunspot; the indistinct rim around such a sunspot. Obsolete. rare. sunspot1676 Astronomy. A relatively dark area appearing for a time on the sun's surface and having a lower temperature than its surroundings. Cf. spot, n.1 1c. solar spot1704 a sunspot. Subcategories:— light part of (2) — dark part of (1) — recurrence of (1) — in corona (2) — specific period of low activity (1) |
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