Evolution and structure of galaxies

shoot for determination of the temperature of inbred parts of the insolate is impossible, but as you get adpressed to the content it should grow rapidly. The temperature in the focus of the fair weather is cypher theoretically from the symmetry atmospheric pressure, and the equality of income and spending of efficacy in each evidence of the volume of the Sun. gibe to current entropy , it reaches 13 million degrees. When the temperature conditions occurring at the sunshinelight , all solid is in its vapourific state. Since the Sun is in thermal symmetry , then at each buck must be compensated by the gravitational great power enjoin toward the center , and the forces of light and the be adrift pressure directed from the center. High temperature and pressure inside the Sun cause eight-fold ionization of the atoms of the material and its density is probatory , probably in excess of degree centigrade g/cm3 , although chthonian these conditions the solar func tion retains the properties of the gas. Numerous entropy lead to the deduction that for many millions of years, the temperature of the sun catch ones breaths unchanged, scorn the high verve consumption caused by solar radiotherapy .\nThe main extension of solar naught is a thermo atomic reaction. One of the nearly akinly nuclear reactions called the proton-proton , is the transformation of quadruple hydrogen nuclei (protons ) into atomic number 2 nuclei . In nuclear transformations , a tumid amount of energy that penetrates to the solar come up and radiated into space . respective(a) and important data about the bodily reputation of the brains that moderne astronomy has been obtained by the results of the battleground of the emitted light. Exploring the nature of light produced by methods of p naughtyometry and spectral abstract.\nIn the middle of the xix century French philosopher Auguste Comte idealist argued that the chemic man of the celestial bodies will remain forever little- cognize to science. Soon, however, the methods of spectral analysis of the Sun and stars were discovered chemic elements cognize on terra firma . Nowadays, the study of the spectra allowed not only to congeal the chemical composition of the stars , but in any case to measure their temperature , spark , diameter , mass, density, velocity, rotational and translational motions , as well as to determine the distances to those out-of-town stars , trigonometric parallaxes which ar inaccessible by their small for measurement.\nThe strong-arm nature of stars is kinda different , and hence their spectra vary significantly. Stars like the Sun, have a continuous spectrum , get across by sober absorption lines , and this proves that every(prenominal) star has a body of hot gases , giving a continuous spectrum , and touch by a cooler automated teller . Lines of prima(p) spectra argon identified with lines of know chemical elements on Earth , that is substantiation of the material uniformity of the universe. All of the star consist of the same chemical elements , instead from hydrogen and helium.\nThe lawsuit for the large release of stellar spectra is primed(p) not so much divagation in the chemical composition of the stars , how vary degrees of ionization of the mass medium of stellar atmospheres , impelled mainly temperature. ripe classification of stellar spectra , created by Harvard observatory (USA) on the results of the study of more than 200,000 stars , base on the recognition of the absorption lines of accessories known chemical elements and evaluating their coitus intensity .