Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
astrophysics in British English
(ˌæstrəʊˈfɪzɪks)
noun
(functioning as singular)
the branch of physics concerned with the physical and chemical properties, origin, and evolution of celestial bodies
Derived forms
astrophysical (ˌastroˈphysical)
adjective
astrophysicist (ˌastroˈphysicist)
noun
astrophysics in American English
(ˌæstroʊˈfɪzɪks)
noun
the main branch of astronomy which deals primarily with the physical properties of the universe, including luminosity, density, temperature, and chemical composition