astrophysics
/ˌæstroʊˈfɪzɪks/
noun
- The branch of astronomy that uses physics and chemistry to understand the nature of stars, planets, galaxies, and the universe as a whole.
- Astrophysics helps us understand how stars are born and how they die.
- The textbook covers the basics of astrophysics, from gravity to nuclear fusion.
- She decided to major in astrophysics because she loves learning about black holes.