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

elliptical galaxy
subject			fact

elliptical galaxy	is a kind of galaxy
	has definition A galaxy with an ellipsoidal shape, without spiral arms. Ellipticals have little interstellar matter and no blue giants - the only giants are red, and they give ellipticals a slightly redder color than spirals. Ellipticals apparently produce only Type I supernovae.
	has classification criteria E0 (spherical) to E7 (greatest eccentricity)
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 elliptical galaxy :

• dwarf elliptical galaxy (5 kinds, 23 facts)
• giant elliptical galaxy (1 kind, 15 facts) - Massive elliptial galaxy which is too far for individual stars to be resolved.