Astrophysics

Astrophysics is the study of how stars, planets, and other things in the Universe work, and how we can learn about them. Astrophysicists use physics and chemistry to explain what astronomers find and see.^[1]

Astrophysics is also the study of how the Universe started and how it is changing with time. This part of astrophysics is called cosmology.

1. ↑ Keeler, James E. 1897. The importance of astrophysical research and the relation of astrophysics to the other physical sciences. The Astrophysical Journal, 6 (4): 271–288, Bibcode:1897ApJ.....6..271K, doi:10.1086/140401, PMID 17796068