Concept information
Preferred term
Galaxies
Definition
- Generally, a large body of gas, dust, and stars held together by their mutual gravitational attraction and ranging in mass from about 10^6 to 10^13 M_sun. If a galaxy also contains dark matter its mass will be much larger. Galaxies are grouped into three main categories: spiral galaxies, elliptical galaxies, and irregular galaxies. (en)
Broader concept
Narrower concepts
- Active galaxies (en)
- Compact galaxies (en)
- Companion galaxies (en)
- Disk galaxies (en)
- Double galaxies (en)
- Dwarf galaxies (en)
- Early-type galaxies (en)
- Elliptical galaxies (en)
- Emission line galaxies (en)
- Field galaxies (en)
- Giant galaxies (en)
- High-redshift galaxies (en)
- High-velocity stars (en)
- Infrared excess galaxies (en)
- Interacting galaxies (en)
- Irregular galaxies (en)
- Late-type galaxies (en)
- Low surface brightness galaxies (en)
- Lyman-alpha galaxies (en)
- Lyman-break galaxies (en)
- Post-starburst galaxies (en)
- Primordial galaxies (en)
- Protogalaxies (en)
- Quasar-galaxy pairs (en)
- Quenched galaxies (en)
- Radio jets (en)
- Starburst galaxies (en)
Editorial note
URI
http://astrothesaurus.org/uat/573
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