as‧tro‧phys‧ics /ˌæstrəʊˈfɪzɪks $ ˌæstrə-, -troʊ-/
noun [uncountable] the scientific study of the chemical structure of the stars and the forces that influence them
—astrophysicist /-ˈfɪzəsəst, -ˈfɪzɪsəst/
noun [countable] [TahlilGaran] Dictionary of Contemporary English ▲