Disc galaxy
From Infogalactic: the planetary knowledge core
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![](/w/images/thumb/f/f4/Ngc253_2mass_barred_spiral.jpg/300px-Ngc253_2mass_barred_spiral.jpg)
The Sculptor Galaxy (NGC 253)
A disc galaxy is a galaxy characterized by a disc, a flattened circular volume of stars. These galaxies may or may not include a central non-disc-like region (a galactic bulge).
Disc galaxy types include:
- spiral galaxies
- unbarred spiral galaxies (types S, SA)
- barred spiral galaxies (type SB)
- intermediate spiral galaxies (type SAB)
- lenticular galaxies (types E8, S0, SA0, SB0, SAB0)
Galaxies that are not disc types include:
- elliptical galaxies (type dE)
- irregular galaxies (type dI)