Messier 15 yana daya daga cikin mafi yawan globulars da aka sani a cikin Milky Way galaxy. Its core ya sami raguwa da aka sani da "core collapse" kuma yana da tsakiya mai yawa tare da taurari masu yawa da ke kewaye da abin da zai iya zama rami mai duhu. Gida ga sama da taurari 100,000, tarin yana da mahimmanci don ƙunshe da yawan taurari masu canji (112) da pulsars (8), ciki har da tsarin tauraron neutron guda ɗaya, M15-C. Hakanan yana ƙunshe da Pease 1, nebula na farko na duniya da aka gano a cikin tarin tauraron duniya a cikin 1928.
360,000 (shekaru ɗari uku da sittin)