Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Messier_67> ?p ?o }
- Messier_67 abstract "Messier 67 (also known as M67 or NGC 2682) is an open cluster in the constellation of Cancer. M67's Trumpler class is variously given as II 2 r, II 2 m, or II 3 r. It was discovered by Johann Gottfried Koehler in 1779. Age estimates for the cluster range between 3.2 and 5 billion years, with the most recent estimate (4 Gyr) implying stars in M67 are younger than the Sun. Distance estimates are likewise varied and typically range between 800–900 pc. Recent estimates of 855, 840, and 815 pc were established via binary star modelling and infrared color-magnitude diagram fitting, accordingly.M67 is not the oldest known open cluster, but there are few Galactic clusters known to be older, and none of those are as close as M67. M67 is an important laboratory for studying stellar evolution, since the cluster is well populated, obscured by negligible amounts of soot, and all its stars are at the same distance and age, except for approximately 30 anomalous blue stragglers, whose origins are not fully understood.M67 is the nearest old open cluster, and thus has become a standard example for studying stellar evolution. It is probably the second best observed open cluster after the Hyades cluster, which is amongst the nearest open clusters and younger than M67. M67 is one of the most-studied open clusters, yet estimates of its physical parameters such as age, mass, and number of stars of a given type, vary substantially. Richer et al. estimate its age to be 4 Gyr, its mass to be 1080 solar masses, and the number of white dwarfs to be 150. Hurley et al. estimate its current mass to be 1400 solar masses and its initial mass to be approximately 10 times as great.M67 has more than 100 stars similar to the Sun, and countless red giants. The total star count has been estimated at well over 500. The ages and prevalence of Sun-like stars contained within the cluster had led astronomers to consider M67 as the possible parent cluster of our own Sun. However, computer simulations have suggested that this is highly unlikely to be the case.The cluster contains no main sequence stars bluer than spectral type F, other than perhaps some of the blue stragglers, since the brighter stars of that age have already left the main sequence. In fact, when the stars of the cluster are plotted on the Hertzsprung-Russell diagram, there is a distinct \"turn-off\" representing the stars which have terminated hydrogen fusion in the core and are destined to become red giants. As the cluster ages, the turn-off moves progressively down the main sequence.It appears that M67 does not contain an unbiased sample of stars. One cause of this is mass segregation, the process by which lighter stars (actually, systems) gain speed at the expense of more massive stars during close encounters, which causes the lighter stars to be at a greater average distance from the center of the cluster or to escape altogether".
- Messier_67 thumbnail Messier_object_067.jpg?width=300.
- Messier_67 wikiPageExternalLink m067.html.
- Messier_67 wikiPageID "964704".
- Messier_67 wikiPageLength "8242".
- Messier_67 wikiPageOutDegree "33".
- Messier_67 wikiPageRevisionID "692896806".
- Messier_67 wikiPageWikiLink 2MASS.
- Messier_67 wikiPageWikiLink Binary_star.
- Messier_67 wikiPageWikiLink Blue_straggler.
- Messier_67 wikiPageWikiLink Brady_Haran.
- Messier_67 wikiPageWikiLink Cancer_(constellation).
- Messier_67 wikiPageWikiLink Category:Astronomical_objects_discovered_in_1779.
- Messier_67 wikiPageWikiLink Category:Cancer_(constellation).
- Messier_67 wikiPageWikiLink Category:Messier_objects.
- Messier_67 wikiPageWikiLink Category:NGC_objects.
- Messier_67 wikiPageWikiLink Category:Open_clusters.
- Messier_67 wikiPageWikiLink Category:Orion–Cygnus_Arm.
- Messier_67 wikiPageWikiLink Hertzsprung–Russell_diagram.
- Messier_67 wikiPageWikiLink Hyades_(star_cluster).
- Messier_67 wikiPageWikiLink Infrared.
- Messier_67 wikiPageWikiLink Johann_Gottfried_Koehler.
- Messier_67 wikiPageWikiLink Light-year.
- Messier_67 wikiPageWikiLink Main_sequence.
- Messier_67 wikiPageWikiLink Mass_segregation_(astronomy).
- Messier_67 wikiPageWikiLink Messier_object.
- Messier_67 wikiPageWikiLink New_General_Catalogue.
- Messier_67 wikiPageWikiLink Open_cluster.
- Messier_67 wikiPageWikiLink Red_giant.
- Messier_67 wikiPageWikiLink Stellar_classification.
- Messier_67 wikiPageWikiLink Stellar_evolution.
- Messier_67 wikiPageWikiLink Sun.
- Messier_67 wikiPageWikiLink White_dwarf.
- Messier_67 wikiPageWikiLink File:Messier_object_067.jpg.
- Messier_67 wikiPageWikiLink File:Open_cluster_HR_diagram_ages.gif.
- Messier_67 wikiPageWikiLinkText "M67".
- Messier_67 wikiPageWikiLinkText "Messier 67".
- Messier_67 wikiPageWikiLinkText "Open Cluster M67".
- Messier_67 age "3.2".
- Messier_67 appmagV "6.1".
- Messier_67 caption "Messier 67".
- Messier_67 constellation Cancer_(constellation).
- Messier_67 dec "+11° 49′".
- Messier_67 distLy "~2.61-2.93 kly".
- Messier_67 distPc "800".
- Messier_67 epoch "J2000.0".
- Messier_67 name "Messier 67".
- Messier_67 names "NGC 2682".
- Messier_67 ra "31878.0".
- Messier_67 radiusLy "10.0".
- Messier_67 sizeV "30".
- Messier_67 wikiPageUsesTemplate Template:Cite_web.
- Messier_67 wikiPageUsesTemplate Template:Commons_category.
- Messier_67 wikiPageUsesTemplate Template:Infobox_open_cluster.
- Messier_67 wikiPageUsesTemplate Template:Messier_objects.
- Messier_67 wikiPageUsesTemplate Template:Reflist.
- Messier_67 wikiPageUsesTemplate Template:Sky.
- Messier_67 wikiPageUsesTemplate Template:WikiSky.
- Messier_67 subject Category:Astronomical_objects_discovered_in_1779.
- Messier_67 subject Category:Cancer_(constellation).
- Messier_67 subject Category:Messier_objects.
- Messier_67 subject Category:NGC_objects.
- Messier_67 subject Category:Open_clusters.
- Messier_67 subject Category:Orion–Cygnus_Arm.
- Messier_67 hypernym Cluster.
- Messier_67 type Language.
- Messier_67 type Catalogue.
- Messier_67 type Object.
- Messier_67 type Redirect.
- Messier_67 comment "Messier 67 (also known as M67 or NGC 2682) is an open cluster in the constellation of Cancer. M67's Trumpler class is variously given as II 2 r, II 2 m, or II 3 r. It was discovered by Johann Gottfried Koehler in 1779. Age estimates for the cluster range between 3.2 and 5 billion years, with the most recent estimate (4 Gyr) implying stars in M67 are younger than the Sun. Distance estimates are likewise varied and typically range between 800–900 pc.".
- Messier_67 label "Messier 67".
- Messier_67 sameAs Q13997.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs مسييه_67.
- Messier_67 sameAs Cúmulu_abiertu_M67.
- Messier_67 sameAs NGC_2682.
- Messier_67 sameAs xd0x90xd0xb1xd0xb5xd0xbaxd1x82_xd0x9cxd0xb5xd1x81xd1x8cxd0xb5_M67.
- Messier_67 sameAs M67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Μεσιέ_67.
- Messier_67 sameAs M67.
- Messier_67 sameAs Cúmulo_abierto_M67.
- Messier_67 sameAs مسیه_۶۷.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs M67_(amas_stellaire).
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs M67_(astronomia).
- Messier_67 sameAs M67_(天体).
- Messier_67 sameAs 메시에_67.
- Messier_67 sameAs Messier_67.
- Messier_67 sameAs Mesjė_67.
- Messier_67 sameAs NGC_2682.
- Messier_67 sameAs NGC_2682.
- Messier_67 sameAs مسیه_۶۷.