FANDOM


Template:Globular cluster

Messier 15 or M15 (also designated NGC 7078) is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier's catalogue of comet-like objects in 1764. At an estimated 13.2 billion years old, it is one of the oldest known globular clusters.

M15 is about 33,600 light-years from Earth. It has an absolute magnitude of -9.2 which translates to a total luminosity of 360,000 times that of the Sun. Messier 15 is one of the most densely packed globulars known in the Milky Way galaxy. Its core has undergone a contraction known as 'core collapse' and it has a central density cusp with an enormous number of stars surrounding what may be a central black hole.Template:Fact

Messier 15 contains 112 variable stars, a rather high number. It also contains at least 8 pulsars, including one double neutron star system, M15 C. Moreover, M15 houses Pease 1, one of only four planetary nebulae known to reside within a globular cluster, which was discovered in 1928.[1]

To the amateur astronomer Messier 15 appears as a fuzzy star in the smallest of telescopes. Mid to large size telescopes (at least 6 in./150 mm diameter) will start to reveal individual stars, the brightest of which are of magnitude +12.6.

Template:Commons





External linksEdit


ReferencesEdit

Template:Messier objects Template:SkyTemplate:Star-cluster-stub

zh-min-nan:Messier 15 be:Аб'ект Месье M15ca:Messier 15 cs:Messier 15 co:M15eo:M15 fr:M15 (amas globulaire) ko:M15 (천체) hr:Messier 15 it:M15 (astronomia) lb:Messier 15 lt:Mesjė 15 hu:Messier 15 nl:Messier 15 ja:M15 (天体) nn:Messier 15ro:Messier 15 ru:Шаровое скопление М15 sk:Hviezdokopa M15 fi:Messier 15 tr:Messier 15zh:M15

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.