#cosmic physics
- Acronychal — Pertaining to acrony; located outside of time or independent of the linear temporal succession. In ancient and classical astronomy, the term describes the acronychal rising of a star or planet, occurring exactly at the moment of sunset (or vice versa), representing a geometric position diametrically opposed to the sun.
- Astrophysical — Belonging to astrophysics, relating to astrophysics; referring to the application of the laws, methods, and principles of physics to the study of the structure, chemical composition, evolution, and dynamic phenomena of celestial bodies (stars, planets, galaxies, black holes) and interstellar space. It also defines the instruments, research, or mathematical models used to explain the behavior of matter and energy on a cosmic scale.