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physical object > natural object > celestial body > collection of stars > galaxy > elliptical galaxy > giant elliptical galaxy > M 87

M 87 (3C 274, Virgo A, 2U 1228+12)
subject			fact

M 87	is an instance of giant elliptical galaxy
	is an instance of radio galaxy
	is an instance of X-ray source
	is an instance of Messier object
	is a part of Virgo cluster
	is a part of Virgo
	has definition A strong radio source. Optically, it is an elliptical galaxy with a luminous blue jet about 1500 pc long. It is also one of the most powerful extragalactic sources of radiation at infrared wavelengths.
	has synonym 3C 274
	has synonym Virgo A
	has synonym 2U 1228+12
	has synonym Virgo X-1
	has Messier number 87
Messier object	has apparent dimension
	has apparent magnitude
	is a part of celestial sphere
	has distance from Earth
	has catalog Messier catalog
	has purpose originally to catalog all objects which could be confused with a comet
X-ray source	has wavelength X-ray
	is a part of celestial sphere
giant elliptical galaxy	has mass 1013 Msun (most massive galaxies known)
radio source	is a part of celestial sphere
galaxy	has number of stars 106 to 1012
celestial body	has spectra
elliptical galaxy	has classification criteria E0 (spherical) to E7 (greatest eccentricity)
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Up: giant elliptical galaxy, Messier object, radio galaxy, X-ray source