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English definition of “astrophysics”

astrophysics

noun [U]     /ˌæs.trəʊˈfɪz.ɪks/ US  /-troʊ-/
the type of astronomy that uses physical laws and ideas to explain the behaviour of the stars and other objects in spaceAstronomy - general words astrophysical     /-ɪ.kəl/ US  /-troʊ-/ adjective Astronomy - general words astrophysicist     /-ɪ.sɪst/ US  /-troʊ-/ noun [C] someone who studies astrophysicsAstronomy - general words
(Definition of astrophysics noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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