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  1. spiral galaxy

    • IPA[ˈspīrəl ˈɡaləksē]
    • n.
      a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
    • noun: spiral galaxy, plural noun: spiral galaxies

    • 更多解釋
    • n.
      a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.

    Oxford Dictionary