Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/H_II_region> ?p ?o }
- H_II_region abstract "An H II region is a region of interstellar hydrogen that is ionized. It is typically a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived blue stars forged in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. The first known H II region was the Orion Nebula, which was examined by telescope in 1610 by Nicolas-Claude Fabri de Peiresc, although its nature was not known.H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II, pronounced H-two by astronomers (an H I region being neutral atomic hydrogen, and a molecular cloud being molecular hydrogen, H2). Such regions have extremely diverse shapes, because the distribution of the stars and gas inside them is irregular. They often appear clumpy and filamentary, sometimes showing bizarre shapes such as the Horsehead Nebula. H II regions may give birth to thousands of stars over a period of several million years. In the end, supernova explosions and strong stellar winds from the most massive stars in the resulting star cluster will disperse the gases of the H II region, leaving behind a cluster of birthed stars such as the Pleiades.H II regions can be seen to considerable distances in the universe, and the study of extragalactic H II regions is important in determining the distance and chemical composition of other galaxies. Spiral and irregular galaxies contain many H II regions, while elliptical galaxies are almost devoid of them. In the spiral galaxies, including the Milky Way, H II regions are concentrated in the spiral arms, while in the irregular galaxies they are distributed chaotically. Some galaxies contain huge H II regions, which may contain tens of thousands of stars. Examples include the 30 Doradus region in the Large Magellanic Cloud and NGC 604 in the Triangulum Galaxy.".
- H_II_region thumbnail Nursery_of_New_Stars_-_GPN-2000-000972.jpg?width=300.
- H_II_region wikiPageExternalLink diffuse.html.
- H_II_region wikiPageExternalLink hii.html.
- H_II_region wikiPageExternalLink showcase-original.
- H_II_region wikiPageID "206947".
- H_II_region wikiPageLength "32972".
- H_II_region wikiPageOutDegree "155".
- H_II_region wikiPageRevisionID "707528522".
- H_II_region wikiPageWikiLink Andromeda_Galaxy.
- H_II_region wikiPageWikiLink Angular_resolution.
- H_II_region wikiPageWikiLink Astronomical_object.
- H_II_region wikiPageWikiLink Astronomical_spectroscopy.
- H_II_region wikiPageWikiLink Astronomy.
- H_II_region wikiPageWikiLink Atom.
- H_II_region wikiPageWikiLink Barnards_Loop.
- H_II_region wikiPageWikiLink Bart_Bok.
- H_II_region wikiPageWikiLink Bok_globule.
- H_II_region wikiPageWikiLink California_Nebula.
- H_II_region wikiPageWikiLink Carina_Nebula.
- H_II_region wikiPageWikiLink Category:H_II_regions.
- H_II_region wikiPageWikiLink Category:Nebulae.
- H_II_region wikiPageWikiLink Chemical_element.
- H_II_region wikiPageWikiLink Density.
- H_II_region wikiPageWikiLink Density_gradient.
- H_II_region wikiPageWikiLink Doubly_ionized_oxygen.
- H_II_region wikiPageWikiLink Electric_charge.
- H_II_region wikiPageWikiLink Electric_field.
- H_II_region wikiPageWikiLink Electron.
- H_II_region wikiPageWikiLink Electron_density.
- H_II_region wikiPageWikiLink Elliptical_galaxy.
- H_II_region wikiPageWikiLink Emission_nebula.
- H_II_region wikiPageWikiLink Energy_level.
- H_II_region wikiPageWikiLink Excited_state.
- H_II_region wikiPageWikiLink File:Bok_globules_in_IC2944.jpg.
- H_II_region wikiPageWikiLink File:Eagle_nebula_pillars.jpg.
- H_II_region wikiPageWikiLink File:Messier51_sRGB.jpg.
- H_II_region wikiPageWikiLink File:Orion_Nebula_-_Hubble_2006_mosaic_18000.jpg.
- H_II_region wikiPageWikiLink Forbidden_mechanism.
- H_II_region wikiPageWikiLink Galaxy.
- H_II_region wikiPageWikiLink Galaxy_cluster.
- H_II_region wikiPageWikiLink Galileo_Galilei.
- H_II_region wikiPageWikiLink Gas.
- H_II_region wikiPageWikiLink H-alpha.
- H_II_region wikiPageWikiLink H_I_region.
- H_II_region wikiPageWikiLink Helium.
- H_II_region wikiPageWikiLink Henry_Norris_Russell.
- H_II_region wikiPageWikiLink Hertzsprung–Russell_diagram.
- H_II_region wikiPageWikiLink Horsehead_Nebula.
- H_II_region wikiPageWikiLink Hubble_Space_Telescope.
- H_II_region wikiPageWikiLink Hydrogen.
- H_II_region wikiPageWikiLink Infrared.
- H_II_region wikiPageWikiLink Interstellar_medium.
- H_II_region wikiPageWikiLink Inverse_Laplace_transform.
- H_II_region wikiPageWikiLink Ion.
- H_II_region wikiPageWikiLink Ionization.
- H_II_region wikiPageWikiLink Irregular_galaxy.
- H_II_region wikiPageWikiLink Johann_Bayer.
- H_II_region wikiPageWikiLink Kelvin.
- H_II_region wikiPageWikiLink Laplace_transform.
- H_II_region wikiPageWikiLink Large_Magellanic_Cloud.
- H_II_region wikiPageWikiLink Light.
- H_II_region wikiPageWikiLink Light-year.
- H_II_region wikiPageWikiLink Local_Group.
- H_II_region wikiPageWikiLink Magnetic_field.
- H_II_region wikiPageWikiLink Margaret_Lindsay_Huggins.
- H_II_region wikiPageWikiLink Metastability.
- H_II_region wikiPageWikiLink Milky_Way.
- H_II_region wikiPageWikiLink Molecular_cloud.
- H_II_region wikiPageWikiLink Molecule.
- H_II_region wikiPageWikiLink NGC_604.
- H_II_region wikiPageWikiLink NGC_7822.
- H_II_region wikiPageWikiLink Naked_eye.
- H_II_region wikiPageWikiLink Nanometre.
- H_II_region wikiPageWikiLink Nicolas-Claude_Fabri_de_Peiresc.
- H_II_region wikiPageWikiLink Nucleosynthesis.
- H_II_region wikiPageWikiLink OB_star.
- H_II_region wikiPageWikiLink Optical_spectrometer.
- H_II_region wikiPageWikiLink Orion_(constellation).
- H_II_region wikiPageWikiLink Orion_Molecular_Cloud_Complex.
- H_II_region wikiPageWikiLink Orion_Nebula.
- H_II_region wikiPageWikiLink Parsec.
- H_II_region wikiPageWikiLink Photon.
- H_II_region wikiPageWikiLink Planetary_nebula.
- H_II_region wikiPageWikiLink Pleiades.
- H_II_region wikiPageWikiLink Proplyd.
- H_II_region wikiPageWikiLink Proton.
- H_II_region wikiPageWikiLink Protoplanetary_nebula.
- H_II_region wikiPageWikiLink Radiation_pressure.
- H_II_region wikiPageWikiLink Radio.
- H_II_region wikiPageWikiLink Reflection_nebula.
- H_II_region wikiPageWikiLink SN_1987A.
- H_II_region wikiPageWikiLink Solar_System.
- H_II_region wikiPageWikiLink Solar_mass.
- H_II_region wikiPageWikiLink Spectral_line.
- H_II_region wikiPageWikiLink Speed_of_sound.
- H_II_region wikiPageWikiLink Spiral_galaxy.
- H_II_region wikiPageWikiLink Star.
- H_II_region wikiPageWikiLink Star_cluster.
- H_II_region wikiPageWikiLink Star_formation.