Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Disciplines (hierarchy name)
4. disciplines (concept)
5. [science and related disciplines]
6. science (modern discipline)
7. natural sciences
8. physical sciences

Narrower term/s

• astrophysics

Anotations

Scope note:

The science that deals with the material universe beyond the earth's atmosphere, comprising the study of celestial objects and extraterrestrial phenomena, and of the nature and history of the universe.