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- Messier_55 abstract "Messier 55 (also known as M55 or NGC 6809 or "The Summer Rose Star") is a globular cluster in the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in June 16, 1752 while observing from South Africa. Starting in 1754, Charles Messier made several attempts to find this object from Paris, France, but the low declination meant it never rose sufficiently far above the horizon to allow for easy observation. He finally observed and catalogued it in 1778. The cluster can be seen with a pair of 50 mm binoculars, although resolving the individual stars requires a medium-sized telescope.M55 is at a distance of about 17,600 light-years away from Earth. It has a mass of about 269,000 times that of the Sun. As with other Milky Way globular clusters, it has a low abundance of elements other than hydrogen and helium compared to the Sun—what astronomers term the metallicity of the cluster. This quantity is normally listed as the base–10 logarithm of the proportion relative to the Sun; for NGC 6809 the metallicity is given by: [Fe/H] = –1.94 dex. Taking this exponent to the powers of 10 yields an abundance equal to 1.1% of the proportion of such elements in the Sun.Only about 55 variable stars have been discovered in the central part of M55.".
- Messier_55 thumbnail M55.jpg?width=300.
- Messier_55 wikiPageExternalLink cluster_4.php?ggc=M+55.
- Messier_55 wikiPageExternalLink m055.html.
- Messier_55 wikiPageID "963970".
- Messier_55 wikiPageRevisionID "592476435".
- Messier_55 age "12.3".
- Messier_55 appmagV "+7.42".
- Messier_55 class "XI".
- Messier_55 constellation Sagittarius_(constellation).
- Messier_55 epoch Epoch_(astronomy).
- Messier_55 hasPhotoCollection Messier_55.
- Messier_55 m "55".
- Messier_55 metalFe "–1.94".
- Messier_55 name "Messier 55".
- Messier_55 names "M55, NGC 6809, GCl 113, C 1936-310".
- Messier_55 ngc "6809".
- Messier_55 radiusLy "48.0".
- Messier_55 sizeV "19".
- Messier_55 subject Category:Carina–Sagittarius_Arm.
- Messier_55 subject Category:Globular_clusters.
- Messier_55 subject Category:Messier_objects.
- Messier_55 subject Category:NGC_objects.
- Messier_55 subject Category:Sagittarius_(constellation).
- Messier_55 comment "Messier 55 (also known as M55 or NGC 6809 or "The Summer Rose Star") is a globular cluster in the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in June 16, 1752 while observing from South Africa. Starting in 1754, Charles Messier made several attempts to find this object from Paris, France, but the low declination meant it never rose sufficiently far above the horizon to allow for easy observation. He finally observed and catalogued it in 1778.".
- Messier_55 label "Cúmulo globular M55".
- Messier_55 label "M 55 (шаровое скопление)".
- Messier_55 label "M55 (astronomia)".
- Messier_55 label "M55 (天体)".
- Messier_55 label "M55".
- Messier_55 label "M55".
- Messier_55 label "Messier 55".
- Messier_55 label "Messier 55".
- Messier_55 label "Messier 55".
- Messier_55 label "Messier 55".
- Messier_55 label "Messier 55".
- Messier_55 label "مسييه 55".
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs Μεσιέ_55.
- Messier_55 sameAs Cúmulo_globular_M55.
- Messier_55 sameAs M55.
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs M55_(astronomia).
- Messier_55 sameAs M55_(天体).
- Messier_55 sameAs 메시에_55.
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs Messier_55.
- Messier_55 sameAs m.03twbb.
- Messier_55 sameAs Q13965.
- Messier_55 sameAs Q13965.
- Messier_55 wasDerivedFrom Messier_55?oldid=592476435.
- Messier_55 depiction M55.jpg.
- Messier_55 isPrimaryTopicOf Messier_55.