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physical object > natural object > celestial body > collection of stars > star cluster > globular cluster > class IX globular cluster > M 4

M 4 comparison table

Subject	has purpose	has reference	has location	has orbit	is part of	has spectra	is a kind of	has catalog	has number of star	has velocity	is an instance of	has diameter	has synonym	has discovery date	has mass	has image	has definition	has distance	has discoverer	has age
class IX globular cluster			most are in the halo some are members of the thick disk	elongated, around the galactic center	halo	low abundances of heavy elements	globular cluster	globular cluster catalog	105 to 106	very high		about 100 light-years			104 to 106 Msun					oldest stellar formation in the Galaxy
Messier object	originally to catalog all objects which could be confused with a comet		or center of gravity		celestial sphere		celestial body	Messier catalog									an object assigned a number by Charles Messier	from Earth
M 4	originally to catalog all objects which could be confused with a comet	NED, SIMBAD	most are in the halo some are members of the thick disk	elongated, around the galactic center	halo	low abundances of heavy elements		Messier catalog	105 to 106	very high	Messier object	about 100 light-years	NGC 6121	1746	104 to 106 Msun			from Earth	Philippe Loys de Cheseaux	oldest stellar formation in the Galaxy

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