Disc galaxy

Disc galaxies are galaxies 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 type are elliptical galaxies (type dE) and irregular galaxies (type dI).

Galaxies

Morphology	Anemic galaxy Disc galaxy Dwarf galaxy elliptical irregular spheroidal spiral Elliptical galaxy Irregular galaxy barred Lenticular galaxy barred unbarred Peculiar galaxy Ring galaxy Polar Spiral galaxy barred flocculent grand design intermediate Magellanic unbarred cD-galaxy

Structure	Bar Bulge Dark matter halo Disc Galactic halo corona Galactic plane Interstellar medium Protogalaxy Spiral arm Supermassive black hole

Active nuclei	Blazar LINER Quasar Radio galaxy X-shaped Relativistic jet Seyfert galaxy

Energetic galaxies	LAE LIRG Starburst galaxy BCD Pea Hot, dust-obscured galaxies (Hot DOGs)

Low activity	LSB UDG

Interaction	Field galaxy Galactic tide Galaxy cloud Galaxy groups and clusters Galaxy group Galaxy cluster Brightest cluster galaxy Fossil galaxy group Interacting galaxy merger Satellite galaxy Stellar stream Superclusters Walls Void galaxy Voids and supervoids

Lists	Galaxies Groups and clusters Large quasar groups Largest Nearest Polar-ring galaxies Ring galaxies Quasars Spiral galaxies Superclusters Voids

See also	Dark galaxy Extragalactic astronomy Faint blue galaxy Galactic astronomy Galaxy formation and evolution Illustris project Intergalactic dust Intergalactic stars Intergalactic travel Population III stars Cosmos Redshift 7 galaxy

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