176 Spiral Galaxies
Spiral Galaxy Types
Spirals
Classes
- Sa, Sb, Sc
Descriptions
- Central Bulge, Arms. Class depends on how tight or loose the arms are.
![Image of Andromeda Galaxy appears like a flattened disk with a central bulge.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-227-andromedaGalaxy.jpg)
Barred Spirals
Classes
- SB
Descriptions
- An elongated bar of stars across the Central Bulge. Is the bar tearing the galaxy apart?
![Image of NGC 613, a Barred spiral galaxy, appears like an elongated bar of stars across the Central Bulge.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-228-barredSpiral.jpg)
Lenticular Spirals
Classes
- S0
- SB0
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.](http://cel.fscj.edu/LUMENS/ast-1002-package/img/figure-229-lenticularSpiral.jpg)