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- Messier_71 abstract "Messier 71 (also known as M71 or NGC 6838) is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1746 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775.M71 is at a distance of about 12,000 light years away from Earth and spans some 27 light years across. The irregular variable star Z Sagittae is a member of this cluster.M71 was long thought (until the 1970s) to be a densely packed open cluster and was classified as such by leading astronomers in the field of star cluster research due to its lacking a dense central compression, and to its stars having more "metals" than is usual for an ancient globular cluster; furthermore, it lacks the RR Lyrae "cluster" variable stars that are common in most globulars. However, modern photometric photometry has detected a short "horizontal branch" in the H-R diagram of M71, which is characteristic of a globular cluster. The shortness of the branch explains the lacking of the RR Lyrae variables and is due to the globular's relatively young age of 9-10 billion years. The relative youth of this globular also explains the abundance of "metals" in its stars. Hence today M71 is designated as a very loosely concentrated globular cluster, much like M68 in Hydra. M71 has a luminosity of around 13,200 suns.".
- Messier_71 thumbnail Messier_71_Hubble_WikiSky.jpg?width=300.
- Messier_71 wikiPageExternalLink cluster_4.php?ggc=M+71.
- Messier_71 wikiPageExternalLink Astro-DSO-NGC-6838.htm.
- Messier_71 wikiPageExternalLink m071.html.
- Messier_71 wikiPageExternalLink potw1018a.
- Messier_71 wikiPageID "964760".
- Messier_71 wikiPageRevisionID "601986135".
- Messier_71 age "9".
- Messier_71 appmagV "+6.1".
- Messier_71 caption "M71 from Hubble Space Telescope; 3.35′ view".
- Messier_71 class "X-XI".
- Messier_71 constellation Sagitta.
- Messier_71 credit NASA.
- Messier_71 credit SKY-MAP.ORG.
- Messier_71 credit Space_Telescope_Science_Institute.
- Messier_71 epoch Epoch_(astronomy).
- Messier_71 hasPhotoCollection Messier_71.
- Messier_71 metalFe "–0.78".
- Messier_71 name "Messier 71".
- Messier_71 names "M71, NGC 6838, GCl 115".
- Messier_71 radiusLy "13.0".
- Messier_71 sizeV "7".
- Messier_71 subject Category:Globular_clusters.
- Messier_71 subject Category:Messier_objects.
- Messier_71 subject Category:NGC_objects.
- Messier_71 subject Category:Sagitta_(constellation).
- Messier_71 comment "Messier 71 (also known as M71 or NGC 6838) is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1746 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775.M71 is at a distance of about 12,000 light years away from Earth and spans some 27 light years across.".
- Messier_71 label "Cúmulo globular M71".
- Messier_71 label "M 71 (шаровое скопление)".
- Messier_71 label "M71 (astronomia)".
- Messier_71 label "M71 (天体)".
- Messier_71 label "M71".
- Messier_71 label "M71".
- Messier_71 label "Messier 71".
- Messier_71 label "Messier 71".
- Messier_71 label "Messier 71".
- Messier_71 label "Messier 71".
- Messier_71 label "Messier 71".
- Messier_71 label "م71".
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs Μεσιέ_71.
- Messier_71 sameAs Cúmulo_globular_M71.
- Messier_71 sameAs M71.
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs M71_(astronomia).
- Messier_71 sameAs M71_(天体).
- Messier_71 sameAs 메시에_71.
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs Messier_71.
- Messier_71 sameAs m.03tyvp.
- Messier_71 sameAs Q14006.
- Messier_71 sameAs Q14006.
- Messier_71 wasDerivedFrom Messier_71?oldid=601986135.
- Messier_71 depiction Messier_71_Hubble_WikiSky.jpg.
- Messier_71 isPrimaryTopicOf Messier_71.
