You searched for: “astrophysics
1. The study of the physical properties, origin, and development of astronomical objects and events (takes a singular verb).
2. The branch of astronomy that deals with the physics of stellar phenomena or astronomical science.
3. That branch of astronomy which treats of the physical or chemical properties of the celestial bodies.

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A unit related to: “astrophysics
(understanding astronomical phenomena in terms of the laws of physics)
Word Entries at Get Words: “astrophysics
1. The science concerning the physical properties of the universe; such as, light, chemical makeup, gravitational forces, etc.
2. A branch of astronomy dealing with the behavior, physical properties, and dynamic processes of celestial objects and phenomena.
This entry is located in the following unit: Astronomy and related astronomical terms (page 4)
Understanding astronomical phenomena in terms of the laws of physics unit.