Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Open_cluster> ?p ?o }
- Open_cluster abstract "An open cluster, also known as galactic cluster, is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist. They are loosely bound by mutual gravitational attraction and become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center, resulting in a migration to the main body of the galaxy as well as a loss of cluster members through internal close encounters. Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.Young open clusters may still be contained within the molecular cloud from which they formed, illuminating it to create an H II region. Over time, radiation pressure from the cluster will disperse the molecular cloud. Typically, about 10% of the mass of a gas cloud will coalesce into stars before radiation pressure drives the rest of the gas away.Open clusters are key objects in the study of stellar evolution. Because the cluster members are of similar age and chemical composition, their properties (such as distance, age, metallicity and extinction) are more easily determined than they are for isolated stars. A number of open clusters, such as the Pleiades, Hyades or the Alpha Persei Cluster are visible with the naked eye. Some others, such as the Double Cluster, are barely perceptible without instruments, while many more can be seen using binoculars or telescopes. The Wild Duck Cluster, M11, is an example.".
- Open_cluster thumbnail The_star_cluster_NGC_3572_and_its_dramatic_surroundings.jpg?width=300.
- Open_cluster wikiPageExternalLink open.html.
- Open_cluster wikiPageExternalLink open_and_globular.html.
- Open_cluster wikiPageExternalLink open_clusters.
- Open_cluster wikiPageExternalLink OpeClu.html.
- Open_cluster wikiPageExternalLink ?ra=12.895&de=-60.3667&zoom=10&img_source=IMG_all.
- Open_cluster wikiPageExternalLink MessierObjects.aspx.
- Open_cluster wikiPageExternalLink movingcluster.html.
- Open_cluster wikiPageID "22669".
- Open_cluster wikiPageLength "49320".
- Open_cluster wikiPageOutDegree "177".
- Open_cluster wikiPageRevisionID "707324167".
- Open_cluster wikiPageWikiLink Abd_al-Rahman_al-Sufi.
- Open_cluster wikiPageWikiLink Adriaan_van_Maanen.
- Open_cluster wikiPageWikiLink Alpha_Persei_Cluster.
- Open_cluster wikiPageWikiLink Arabic_numerals.
- Open_cluster wikiPageWikiLink Astrometry.
- Open_cluster wikiPageWikiLink Astronomical_spectroscopy.
- Open_cluster wikiPageWikiLink Astronomical_unit.
- Open_cluster wikiPageWikiLink Bayer_designation.
- Open_cluster wikiPageWikiLink Beehive_Cluster.
- Open_cluster wikiPageWikiLink Berkeley_29.
- Open_cluster wikiPageWikiLink Beryllium.
- Open_cluster wikiPageWikiLink Big_Dipper.
- Open_cluster wikiPageWikiLink Binoculars.
- Open_cluster wikiPageWikiLink Blue_straggler.
- Open_cluster wikiPageWikiLink Brown_dwarf.
- Open_cluster wikiPageWikiLink Category:Open_clusters.
- Open_cluster wikiPageWikiLink Category:Star_clusters.
- Open_cluster wikiPageWikiLink Cepheid_variable.
- Open_cluster wikiPageWikiLink Charles_Messier.
- Open_cluster wikiPageWikiLink Chemical_element.
- Open_cluster wikiPageWikiLink Circumstellar_disc.
- Open_cluster wikiPageWikiLink Classical_Cepheid_variable.
- Open_cluster wikiPageWikiLink Comet.
- Open_cluster wikiPageWikiLink Convection.
- Open_cluster wikiPageWikiLink Cosmic_distance_ladder.
- Open_cluster wikiPageWikiLink Cubic_light_year.
- Open_cluster wikiPageWikiLink Doppler_effect.
- Open_cluster wikiPageWikiLink Double_Cluster.
- Open_cluster wikiPageWikiLink Earth.
- Open_cluster wikiPageWikiLink Eduard_Schönfeld.
- Open_cluster wikiPageWikiLink Edward_Emerson_Barnard.
- Open_cluster wikiPageWikiLink Ejnar_Hertzsprung.
- Open_cluster wikiPageWikiLink Electromagnetic_spectrum.
- Open_cluster wikiPageWikiLink Elliptical_galaxy.
- Open_cluster wikiPageWikiLink Escape_velocity.
- Open_cluster wikiPageWikiLink Extinction_(astronomy).
- Open_cluster wikiPageWikiLink File:Eagle_nebula_pillars.jpg.
- Open_cluster wikiPageWikiLink Galactic_Center.
- Open_cluster wikiPageWikiLink Galactic_plane.
- Open_cluster wikiPageWikiLink Galileo_Galilei.
- Open_cluster wikiPageWikiLink Giovanni_Battista_Hodierna.
- Open_cluster wikiPageWikiLink Globular_cluster.
- Open_cluster wikiPageWikiLink Gravity.
- Open_cluster wikiPageWikiLink H_II_region.
- Open_cluster wikiPageWikiLink Half-life.
- Open_cluster wikiPageWikiLink Helium.
- Open_cluster wikiPageWikiLink Hertzsprung–Russell_diagram.
- Open_cluster wikiPageWikiLink Hipparcos.
- Open_cluster wikiPageWikiLink Hodge_301.
- Open_cluster wikiPageWikiLink Hyades_(star_cluster).
- Open_cluster wikiPageWikiLink Hydrogen.
- Open_cluster wikiPageWikiLink Hydrogen_line.
- Open_cluster wikiPageWikiLink IC_2391.
- Open_cluster wikiPageWikiLink Infrared_dark_cloud.
- Open_cluster wikiPageWikiLink Irregular_galaxy.
- Open_cluster wikiPageWikiLink Johann_Bayer.
- Open_cluster wikiPageWikiLink John_Louis_Emil_Dreyer.
- Open_cluster wikiPageWikiLink John_Michell.
- Open_cluster wikiPageWikiLink Kelvin.
- Open_cluster wikiPageWikiLink Kepler-66.
- Open_cluster wikiPageWikiLink Kepler-67.
- Open_cluster wikiPageWikiLink Large_Magellanic_Cloud.
- Open_cluster wikiPageWikiLink Light-year.
- Open_cluster wikiPageWikiLink List_of_open_clusters.
- Open_cluster wikiPageWikiLink Lithium.
- Open_cluster wikiPageWikiLink Local_Group.
- Open_cluster wikiPageWikiLink Main_sequence.
- Open_cluster wikiPageWikiLink Messier_41.
- Open_cluster wikiPageWikiLink Messier_47.
- Open_cluster wikiPageWikiLink Messier_7.
- Open_cluster wikiPageWikiLink Metallicity.
- Open_cluster wikiPageWikiLink Metre_per_second.
- Open_cluster wikiPageWikiLink Milky_Way.
- Open_cluster wikiPageWikiLink Molecular_cloud.
- Open_cluster wikiPageWikiLink Moving_cluster_method.
- Open_cluster wikiPageWikiLink NGC_2362.
- Open_cluster wikiPageWikiLink NGC_2451.
- Open_cluster wikiPageWikiLink NGC_6811.
- Open_cluster wikiPageWikiLink Nebula.
- Open_cluster wikiPageWikiLink New_General_Catalogue.
- Open_cluster wikiPageWikiLink Nuclear_fusion.
- Open_cluster wikiPageWikiLink OB_star.
- Open_cluster wikiPageWikiLink Open_cluster_family.
- Open_cluster wikiPageWikiLink Open_cluster_remnant.
- Open_cluster wikiPageWikiLink Optical_telescope.
- Open_cluster wikiPageWikiLink Parallax.
- Open_cluster wikiPageWikiLink Parsec.