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physical object > natural object > celestial body > collection of stars > galaxy > radio galaxy > D galaxy > db galaxy

db galaxy
subject			fact

db galaxy	has definition One of a small number of dumbbell-shaped radio galaxies. They might be called D systems with double nuclei, in which two elliptical nuclei share a common extended envelope.
	is a kind of D galaxy
radio source	has wavelength radio
	is a part of celestial sphere
	has catalog radio source catalog
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

Up: D galaxy