Astrophysics (Index)About

dwarf galaxy

(small galaxy with a few billion stars)

The term dwarf galaxy is used for galaxies much smaller than the Milky Way, i.e., of a few billion stars at most, and as small as 100 parsecs across. They can be any of the normal galaxy types, such as a spiral galaxy. Often they are satellite galaxies. Some more specific terms:

(The term compact galaxy (CG) came into use meaning it has a high surface brightness compared to its apparent diameter, which can be the result of a very high density of stars.)

Example dwarf galaxies (in the Local Group):

Beyond the Local Group:

(galaxy type)
Further reading:

Referenced by pages:
dark matter
David Dunlap Observatory Catalog (DDO)
dwarf galaxy classification
dwarf galaxy problem
dwarf spheroidal galaxy (dSph)
galactic disk
galaxy group
Haro 29
hierarchical assembly of galaxies
I Zwicky 18 (I Zw 18)
Local Group (LG)
low-surface-brightness galaxy (LSB galaxy)
Andromeda (M31)
rare designator prefixes
repulsive dark matter (RDM)
satellite galaxy
SBS 0335-052
star formation (SF)
stellar stream
TiNy Titans (TNT)
Triangulum II (Tri II)
ultra-faint dwarf galaxy (UFD)