13.19: 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
        
        NGC 2787, Lenticular SpiralPublic Domain | Image courtesy of NASA.

Provided by: Florida State College at Jacksonville. License: CC BY: Attribution