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14.19: Spiral Galaxies

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    Spiral galaxies are those galaxies which appear like flattened disks with a central bulge, usually with arms. There are three main types or classes of Spirals based on their shapes.

    Spiral Galaxy Types

    Spirals

    Classes

    • Descriptions
      • Classes
        • Descriptions
          • Classes
            • Descriptions
              • No Spiral Arms, but disk-shaped.Appear to be old when compared to other spirals
              Image of NGC 2787, Lenticular Spiral galaxy is disk-shaped with no spiral arms.
              NGC 2787, Lenticular SpiralPublic Domain | Image courtesy of NASA.
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