Astrophysics Definition

ăstrō-fĭzĭks
noun
The branch of applied physics that deals with astronomical phenomena.
American Heritage
The main branch of astronomy which deals primarily with the physical properties of the universe, including luminosity, density, temperature, and chemical composition.
Webster's New World
The definition of astrophysics is a branch of astronomy that studies the composition and origin of objects in outer space along with the way they interact with each other and other matter.
A person who studies black holes, dark matter, and cosmic strings is an example of a person who is involved with astrophysics.
YourDictionary

The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.

Wiktionary
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Origin of Astrophysics

  • astro- +‎ physics

    From Wiktionary

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