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physical object > natural object > celestial body > collection of stars > galaxy > dwarf galaxy

dwarf galaxy
subject			fact

dwarf galaxy	has definition A galaxy with low luminosity.
	has definition A small, faint galaxy, exemplified by those that orbit the Milky Way: Ursa Minor, Draco, Sculptor, Sextans, Carina, Fornax, Leo II, and Leo I.
	is a kind of galaxy
galaxy	has number of stars 106 to 1012
	has catalog galaxy catalog
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of dwarf galaxy :

• blue compact dwarf galaxy (2 facts) (BCD)
• satellite galaxy (18 kinds, 130 facts) - A galaxy that orbits a larger one. The Milky Way has at least ten satellite galaxies.
• tidal dwarf galaxy (3 facts) (TDG) - A self-gravitating entity of dwarf-galaxy mass, built from tidal material expelled during interactions (e.g. AM0547-244, AM1054-325 and AM1353-272)