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| physical object > natural object > celestial body > collection of stars > star cluster > globular cluster > class IX globular cluster | 
| class IX globular cluster comparison table | ||||||
| Subject | has reference | has synonym | has discovery date | has image | has discoverer | has Messier number | 
|---|---|---|---|---|---|---|
| M 12 | NED, SIMBAD | NGC 6218 | 1764 | ![]()  | Charles Messier | 12 | 
| M 4 | NED, SIMBAD | NGC 6121 | 1746 | Philippe Loys de Cheseaux | 4 | |
| M 72 | NED, SIMBAD | NGC 6981 | 1780 | ![]()  | Pierre Mechain | 72 | 
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