Spiral Galaxy (noun) Definition, Meaning & Examples

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noun Astronomy.
  1. a galaxy having a spiral structure.
noun
  1. a galaxy consisting of an ellipsoidal nucleus of old stars from opposite sides of which arms, containing younger stars, spiral outwards around the nucleus. In a barred spiral the arms originate at the ends of a bar-shaped nucleus
    Spiral Galaxy (noun) Definition, Meaning & Examples

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