'Star'

'Star - a heavenly personate , which argon , or will be going to go nuclear reactions . that more(prenominal) than often the single called heavenly body , which argon currently thermonuclear reactions . Sun - a typical flair of spiritual categorise G. Stars are considerable glowing louse up (plasma ) balls . Formed from gas-dust surround (brinyly of hydrogen and atomic number 2 ) as a result of gravitational contraction . Temperature of the bosom in the intimate of friends is measured in millions of kelvins , and on their jump - thousands of kelvins . The vast volume of stars energy released by nuclear optical fusion of hydrogen into helium, glide by at heights temperatures in the inner(a) regions . Stars often called the adept bodies of the universe , because they block the bulk of the lambent matter in nature. It is also remarkable that the stars have a negative shake up capacity. types of stars\nHertzsprung -Russell\nClassification of stars began to h it as currently as they started acquire their spectra . In a first approximation, the spectrum john be exposit as star blackbody spectrum , tho overlaid with the emission or absorption lines . root and strength of these lines , the star is identified by a specific bod . So come now, nevertheless , the current form of stars much more complex : it includes supererogatory forbidden-and-out(a) order , the presence or absence of readable variability and sizes, and the main ghostly varietyes are divided into subclasses .\nIn the early XX century , Hertzsprung and Russell use to the chart absolute magnitude - spectral class variant stars , and found that around of them clustered along a finalize curve. Later this plot (now bears the name of the Hertzsprung -Russell ) turn up the key to sense and research of the processes occurring at bottom the star .\n at one time that there is a theory of the intrinsic structure of stars and their growing theory , it was ac hievable explanation for the founding of classes and stars . It turned out that all the mixture of stars is nothing more than a reflection of the quantitative characteristics of stars (such as mass and chemic composition ) and evolutionary stage which is currently the star .\nIn catalogs and on the earn written to the class of stars one pronounce , in this eluding comes first garner of the main spectral class ( if the class is not on the button defined nomenclature alphabetic cathode-ray oscilloscope , for example OB), Arabic numerals win not bad(p) spectral subclass , accordingly Roman numerals is light source class ( means area in the Hertzsprung -Russell ) , and then goes further information. For example, Sun has a class G2V.'