stellar dynamics उदाहरण वाक्य

As his career progressed he was noted for changing his focus, reflected in such book titles as " An Introduction to the Study of Stellar Structure " ( 1939 ), " Principles of Stellar Dynamics " ( 1943 ) and " Radiative Transfer " ( 1950 ), all widely used as textbooks, and " The Mathematical Theory of Black Holes " ( 1983 ).