astrophysics
noun [ U ] uk/ˌæs.trəʊˈfɪz.ɪks/ us/ˌæs.troʊˈfɪz.ɪks/
天体物理学
the type of astronomy that uses physical laws and ideas to explain the behaviour of the stars and other objects in space
astrophysicist
noun [ C ] uk/ˌæs.trəʊˈfɪz.ɪ.sɪst/ us/ˌæs.troʊˈfɪz.ɪ.sɪst/
天体物理学家
someone who studies astrophysics