From Wikipedia:
Spanning 165 light-years across, M5 is one of the larger globular clusters known. The gravitational sphere of influence of M5, (ie. the volume of space where stars would be gravitationally bound to the cluster and not ripped away from it by the Milky Way's gravitational pull), has a radius of some 200 light-years.
At 13 billion years old it is also one of the older globulars associated with the Milky Way Galaxy. The distance of M5 is about 24,500 light-years away from Earth and the cluster contains more than 100,000 stars up to perhaps 500,000 according to some estimates.
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