Astronomy. A spiral nebula.
单词 | θ1149 |
释义 | the world > the universe > constellation > galaxy > [noun] > spiral galaxy (4) spiral1850 Astronomy. A spiral nebula. spiral nebula1850 a spiral galaxy (now chiefly Historical). spiral galaxy1913 a galaxy in which bright stars and gas clouds tend to be located along arms that appear to spiral from a central nucleus. Subcategories:— arm of (1) |
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