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

tidal dwarf galaxy comparison table

Subject	has definition	has acronym	is a kind of
dwarf galaxy	A small, faint galaxy, exemplified by those that orbit the Milky Way: Ursa Minor, Draco, Sculptor, Sextans, Carina, Fornax, Leo II, and Leo I.		galaxy
tidal dwarf galaxy	A self-gravitating entity of dwarf-galaxy mass, built from tidal material expelled during interactions (e.g. AM0547-244, AM1054-325 and AM1353-272)	TDG	dwarf galaxy

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