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- Stellar_classification abstract "In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colours interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.Most stars are currently classified under the Morgan–Keenan (MKK) system using the letters O, B, A, F, G, K, M, L, T and Y, a sequence from the hottest (O type) to the coolest (Y type). The types R and N are carbon-based stars, and the type S is zirconium-monoxide-based stars. Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler).In the MKK system a luminosity class is added to the spectral class using Roman numerals. This is based on the width of certain absorption lines in the star's spectrum which vary with the density of the atmosphere and so distinguish giant stars from dwarfs. Luminosity class 0 stars for hypergiants, class I stars for supergiants, class II for bright giants, class III for regular giants, class IV for sub-giants, class V for main-sequence stars, class VI for sub-dwarfs, class VII for white dwarfs, and class VIII for brown dwarfs. The full spectral class for the Sun is then G2V, indicating a main-sequence star with a temperature around 5,800K.".
- Stellar_classification thumbnail Obafgkm_noao_big.jpg?width=300.
- Stellar_classification wikiPageExternalLink vol11sp.pdf.
- Stellar_classification wikiPageExternalLink spectra.html.
- Stellar_classification wikiPageExternalLink MKbook.html.
- Stellar_classification wikiPageID "28927".
- Stellar_classification wikiPageRevisionID "606359623".
- Stellar_classification hasPhotoCollection Stellar_classification.
- Stellar_classification subject Category:Classification_systems.
- Stellar_classification subject Category:Hertzsprung–Russell_classifications.
- Stellar_classification subject Category:Star_types.
- Stellar_classification subject Category:Stars.
- Stellar_classification subject Category:Stars_by_luminosity_class.
- Stellar_classification subject Category:Stars_by_spectral_type.
- Stellar_classification subject Category:Stellar_astronomy.
- Stellar_classification type CelestialBody109239740.
- Stellar_classification type NaturalObject100019128.
- Stellar_classification type Object100002684.
- Stellar_classification type PhysicalEntity100001930.
- Stellar_classification type Star109444100.
- Stellar_classification type Stars.
- Stellar_classification type StarsByLuminosityClass.
- Stellar_classification type StarsBySpectralType.
- Stellar_classification type Whole100003553.
- Stellar_classification comment "In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Light from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colours interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere.".
- Stellar_classification label "Clasificación estelar".
- Stellar_classification label "Classificazione stellare".
- Stellar_classification label "Classificação estelar".
- Stellar_classification label "Klassifizierung der Sterne".
- Stellar_classification label "Spectraalklasse".
- Stellar_classification label "Stellar classification".
- Stellar_classification label "Typ widmowy".
- Stellar_classification label "Type spectral".
- Stellar_classification label "Спектральные классы звёзд".
- Stellar_classification label "تصنيف نجمي".
- Stellar_classification label "スペクトル分類".
- Stellar_classification label "恒星光谱".
- Stellar_classification sameAs Spektrální_klasifikace.
- Stellar_classification sameAs Klassifizierung_der_Sterne.
- Stellar_classification sameAs Clasificación_estelar.
- Stellar_classification sameAs Type_spectral.
- Stellar_classification sameAs Klasifikasi_bintang.
- Stellar_classification sameAs Classificazione_stellare.
- Stellar_classification sameAs スペクトル分類.
- Stellar_classification sameAs 항성분류.
- Stellar_classification sameAs Spectraalklasse.
- Stellar_classification sameAs Typ_widmowy.
- Stellar_classification sameAs Classificação_estelar.
- Stellar_classification sameAs m.0756_.
- Stellar_classification sameAs Q179600.
- Stellar_classification sameAs Q179600.
- Stellar_classification sameAs Stellar_classification.
- Stellar_classification wasDerivedFrom Stellar_classification?oldid=606359623.
- Stellar_classification depiction Obafgkm_noao_big.jpg.
- Stellar_classification isPrimaryTopicOf Stellar_classification.