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H II region
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Details
An H II region is a cloud of glowing low density gas and plasma, sometimes several hundred light-years across, in which star formation is taking place. Young, hot, blue stars which have formed from the gas emit copious amounts of ultraviolet light, ionizing and heating the gas surrounding them. H II regions are often associated with giant molecular clouds from which they form together with stars. The first H II known region is Orion Nebula discovered in 1610 by Nicolas-Claude Fabri de Peiresc. H II regions are named for the large amount of ionised atomic hydrogen they contain, referred to as H II by astronomers (H I region being neutral atomic hydrogen, and H2 being molecular hydrogen). They have extremely diverse morphologies, because the distribution of the stars and gas inside them is inhomogeneous. They often appear clumpy and filamentary, sometimes showing bizarre shapes like the Horsehead Nebula
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130282592
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Genre Physik & Astronomie
- Größe H220mm x B150mm x T17mm
- Jahr 2010
- EAN 9786130282592
- Format Fachbuch
- ISBN 978-613-0-28259-2
- Titel H II region
- Untertitel Gas, Plasma (physics), Light-year, Star formation, Hertzsprung-Russell diagram, Ultraviolet, Molecular cloud, Orion Nebula, Nicolas-Claude Fabri de Peiresc, Atom, Hydrogen, Ion, Astronomy, H I region
- Gewicht 439g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 284
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