Eng

天體物理學

Branch of astronomy concerned with the physical nature of stars, galaxies, interstellar clouds, and other objects, including their luminosities, temperatures, densities, and chemical composition

天體運行

branch of astronomy that deals with the motions and gravitational interactions of objects in outer space; The computation of the motion of the bodies through orbital mechanics can be simplified by using an appropriate inertial frame of reference which leads to the use of various different coordinate systems such as the Heliocentric (Sun-centered) coordinate system (The)

宇宙化學

Branch of chemistry that examines the chemical composition and changes of objects in the universe