Monograph . - M. : World, 1980. — 496 s. — (translated from English) . The book outlines ways to study and analyze stellar atmospheres based on the consistent application of Fourier analysis. Methods of constructing models of photospheres, measurement and analysis of the continuous spectrum and absorption lines . are considered in detail It is shown how various parameters of stellar atmospheres are determined on the basis of the behavior of spectral lines: chemical composition, temperature, pressure in the photosphere, speed of movements, etc. d. The book successfully combines theory and its practical application. It will be of great interest to astronomers and physicists and can serve as a good teaching tool for students - astrophysicists, opticians, spectroscopists. Translation Editor's Foreword. Foreword by . Basic Concepts . Fourier Conversions. Spectroscopic instruments. Radiation receivers. Radiation. Terminology and definitions. Totally black body and its radiation . Radiant and convective energy transfer. Continuous Absorption Rate. Model of photosphere. Continuous spectra of stars and their observations. Absorption rate in line. Measurement of spectral lines . The behavior of spectral lines . Chemical analysis . Determination of temperature and radii of stars. Measurement of pressure in the photospheres of stars . Rotation of stars. Turbulence in stellar photospheres.