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- Corona abstract "A corona (Latin, 'crown') is a type of plasma that surrounds the Sun and other celestial bodies. The Sun's corona extends millions of kilometres into space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph. The word "corona" is a Latin word meaning crown, from the Ancient Greek κορώνη (korōnē, “garland, wreath”).The high temperature of the Sun's corona gives it unusual spectral features, which led some in the 19th century to suggest that it contained a previously unknown element, "coronium". These spectral features have since been traced to highly ionized iron (Fe-XIV). Bengt Edlén, following the work of Grotrian (1939), first identified the coronal lines in 1940 (observed since 1869) as transitions from low-lying metastable levels of the ground configuration of highly ionised metals (the green FeXIV line at 5303 Å, but also the red line FeX at 6374 Å). These high stages of ionisation indicate a plasma temperature in excess of 1,000,000 kelvin.Light from the corona comes from three primary sources, which are called by different names although all of them share the same volume of space. The K-corona (K for kontinuierlich, "continuous" in German) is created by sunlight scattering off free electrons; Doppler broadening of the reflected photospheric absorption lines completely obscures them, giving the spectral appearance of a continuum with no absorption lines. The F-corona (F for Fraunhofer) is created by sunlight bouncing off dust particles, and is observable because its light contains the Fraunhofer absorption lines that are seen in raw sunlight; the F-corona extends to very high elongation angles from the Sun, where it is called the zodiacal light. The E-corona (E for emission) is due to spectral emission lines produced by ions that are present in the coronal plasma; it may be observed in broad or forbidden or hot spectral emission lines and is the main source of information about the corona's composition.".
- Corona thumbnail Solar_eclipse_1999_4_NR.jpg?width=300.
- Corona wikiPageExternalLink corona.
- Corona wikiPageExternalLink coronatemp.
- Corona wikiPageExternalLink ap090726.html.
- Corona wikiPageExternalLink alfven-waves-may-heat-the-suns.html.
- Corona wikiPageExternalLink corona.html.
- Corona wikiPageExternalLink sun-heat-mystery-110106.html.
- Corona wikiPageExternalLink sohowww.nascom.nasa.gov.
- Corona wikiPageExternalLink Qcorona.html.
- Corona wikiPageExternalLink corona.shtml.
- Corona wikiPageExternalLink 295.pdf.
- Corona wikiPageExternalLink report-33153.html.
- Corona wikiPageExternalLink pdf13.pdf.
- Corona wikiPageExternalLink 55.abstract?sid=18d15db8-169c-4ebf-a391-dc1ad55f0fa9.
- Corona wikiPageExternalLink watch?v=o-v9kLLiK4s.
- Corona wikiPageExternalLink xrt.cfa.harvard.edu.
- Corona wikiPageExternalLink ETMV-Libro_new.pdf?attredirects=0yd=1.
- Corona wikiPageID "7839".
- Corona wikiPageRevisionID "606356939".
- Corona hasPhotoCollection Corona.
- Corona subject Category:Light_sources.
- Corona subject Category:Plasma_physics.
- Corona subject Category:Solar_phenomena.
- Corona subject Category:Space_plasmas.
- Corona subject Category:Sun.
- Corona subject Category:Unsolved_problems_in_astronomy.
- Corona comment "A corona (Latin, 'crown') is a type of plasma that surrounds the Sun and other celestial bodies. The Sun's corona extends millions of kilometres into space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph.".
- Corona label "Coroa solar".
- Corona label "Corona (astronomie)".
- Corona label "Corona solar".
- Corona label "Corona solare".
- Corona label "Corona".
- Corona label "Couronne solaire".
- Corona label "Korona (Sonne)".
- Corona label "Korona słoneczna".
- Corona label "Солнечная корона".
- Corona label "هالة (فضاء)".
- Corona label "コロナ".
- Corona label "日冕".
- Corona sameAs Koróna.
- Corona sameAs Korona_(Sonne).
- Corona sameAs Αστρικό_στέμμα.
- Corona sameAs Corona_solar.
- Corona sameAs Eguzki_koroa.
- Corona sameAs Couronne_solaire.
- Corona sameAs Korona.
- Corona sameAs Corona_solare.
- Corona sameAs コロナ.
- Corona sameAs 코로나.
- Corona sameAs Corona_(astronomie).
- Corona sameAs Korona_słoneczna.
- Corona sameAs Coroa_solar.
- Corona sameAs m.0266h.
- Corona sameAs Q170754.
- Corona sameAs Q170754.
- Corona wasDerivedFrom Corona?oldid=606356939.
- Corona depiction Solar_eclipse_1999_4_NR.jpg.
- Corona isPrimaryTopicOf Corona.
