noun plural but singular or plural in construction as·tro·phys·ics \ˌas-trə-ˈfi-ziks\

: the scientific study of the physical and chemical properties and structures of stars, planets, and other objects in outer space

Full Definition of ASTROPHYSICS

:  a branch of astronomy dealing especially with the behavior, physical properties, and dynamic processes of celestial objects and phenomena
as·tro·phys·i·cal \-zi-kəl\ adjective
as·tro·phys·i·cal·ly \-zi-k(ə-)lē\ adverb
as·tro·phys·i·cist \-ˈfi-zə-sist, -ˈfiz-sist\ noun


International Scientific Vocabulary
First Known Use: 1890


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