astrophysicist       
noun [ C ] uk/ˌæs.trəʊˈfɪz.ɪ.sɪst/ us/ˌæs.troʊˈfɪz.ɪ.sɪst/
 天体物理学家
someone who studies astrophysics (= the study of stars and other objects in space using physical laws) 
  The director of the planetarium is a well-known and popular astrophysicist. 天文馆的馆长是一位受欢迎的著名天体物理学家。 
 Theoretical astrophysicists work with equations and computer simulations and don't usually get involved in spacecraft design. 理论天体物理学家从事方程式和计算机模拟工作,通常不参与航天器设计。 
 See: astrophysics
 - More examples
 - She is a distinguished astrophysicist known for her work on dark matter.
 - I was surprised to find myself face to face with renowned astrophysicist Stephen Hawking.
 - Most astrophysicists have accepted the idea that the cosmos was born from a kind of explosion.
 - He was regarded as one of the very best particle astrophysicists in the world.