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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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