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- Messier_54 abstract "Messier 54 (also known as M54 or NGC 6715) is a globular cluster in the constellation Sagittarius. It was discovered by Charles Messier in 1778 and subsequently included in his catalog of comet-like objects.Previously thought to belong to our Galaxy at a distance from Earth of about 50,000 light-years, it was discovered in 1994 that M54 most likely belongs to the Sagittarius Dwarf Elliptical Galaxy (SagDEG), making it the first globular cluster formerly thought to be part of our galaxy reassigned to extragalactic status, even if not recognized as such for nearly two and a quarter centuries.Modern estimates now place M54 at a distance of some 87,000 light-years, translating into a true radius of 150 light-years across. It is one of the denser of the globulars, being of class III (I being densest and XII being the least dense). It shines with the luminosity of roughly 850,000 times that of the Sun and has an absolute magnitude of −10.0.As it is located on SagDEG's center, some authors think it actually may be its core; however others have proposed that it is a real globular cluster that fell to the center of this galaxy due to decay of its orbit caused by dynamical frictionM54 is easily found in the sky, being close to the star ζ Sagittarii. It is, however, not resolvable into individual stars even with larger amateur telescopes.In July 2009, a team of astronomers reported that they had found evidence of an intermediate-mass black hole in the core of M54.".
- Messier_54 thumbnail Messier_54_HST.jpg?width=300.
- Messier_54 wikiPageExternalLink m054.html.
- Messier_54 wikiPageID "962638".
- Messier_54 wikiPageRevisionID "604375074".
- Messier_54 age "13".
- Messier_54 appmagV "8.37".
- Messier_54 caption "M54 by Hubble Space Telescope; 3.4′ view".
- Messier_54 class "III".
- Messier_54 constellation Sagittarius_(constellation).
- Messier_54 credit "ESA/Hubble & NASA".
- Messier_54 epoch Epoch_(astronomy).
- Messier_54 hasPhotoCollection Messier_54.
- Messier_54 m "54".
- Messier_54 name "Messier 54".
- Messier_54 names "M54, NGC 6715, GCl 104, C 1851-305".
- Messier_54 ngc "6715".
- Messier_54 notes "Probably extragalactic".
- Messier_54 radiusLy "153.0".
- Messier_54 sizeV "12".
- Messier_54 subject Category:Globular_clusters.
- Messier_54 subject Category:Messier_objects.
- Messier_54 subject Category:NGC_objects.
- Messier_54 subject Category:Objects_within_100_kly_of_Earth.
- Messier_54 subject Category:Sagittarius_(constellation).
- Messier_54 subject Category:Sagittarius_Dwarf_Spheroidal_Galaxy.
- Messier_54 comment "Messier 54 (also known as M54 or NGC 6715) is a globular cluster in the constellation Sagittarius.".
- Messier_54 label "Cúmulo globular M54".
- Messier_54 label "M 54 (шаровое скопление)".
- Messier_54 label "M54 (astronomia)".
- Messier_54 label "M54".
- Messier_54 label "M54".
- Messier_54 label "M54".
- Messier_54 label "Messier 54".
- Messier_54 label "Messier 54".
- Messier_54 label "Messier 54".
- Messier_54 label "Messier 54".
- Messier_54 label "Messier 54".
- Messier_54 label "مسييه 54".
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs Μεσιέ_54.
- Messier_54 sameAs Cúmulo_globular_M54.
- Messier_54 sameAs M54.
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs M54_(astronomia).
- Messier_54 sameAs M54.
- Messier_54 sameAs 메시에_54.
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs Messier_54.
- Messier_54 sameAs m.03trp0.
- Messier_54 sameAs Q13962.
- Messier_54 sameAs Q13962.
- Messier_54 wasDerivedFrom Messier_54?oldid=604375074.
- Messier_54 depiction Messier_54_HST.jpg.
- Messier_54 isPrimaryTopicOf Messier_54.
