272 Stellar Structure and Evolution. Structure and evolution of stars, stellar energy sources and problems of nucleosynthesis, theory of variable stars, structure of sun from helioseismology and neutrinos. 273 Stellar Photospheres Physics of stellar photospheres. Radiative transfer under stellar atmosphere conditions. Continuous and line spectra of stars.
Chemical abundances in stars.
Stellar winds and stars with extended atmospheres. Thermal and physical history of universe. Interaction of matter and cosmic microwave background radiation. Study of inhomogeneities in the universe from inflationary epoch to the current large-scale structure. 276 Instrumentation and Observational Techniques Telescopes, optical principles, cameras, and spectrographs.