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Yes. The largest of the globular star clusters, and one of the nearest to the Earth, is Omega Centauri, some 17,000 light years away. Unfortunately, it can only be seen from the Southern Hemisphere. However, M13 (Messier Object 13), the Great Cluster in Hercules, can be seen from the Northern Hemisphere. It contains over 300,000 stars, and its total luminosity is 300 thousand times that of the Sun.
H. Charles Romesburg has written: 'Users manual for CLUSTAR/CLUSTID computer programs for hierarchical cluster analysis' -- subject(s): CLUSTAR, CLUSTID, Cluster analysis, Computer programs