the branch of astronomy that uses the laws and methods of physics to explain the properties and behaviour of stars, planets, galaxies, and other objects in space
Dr. Nguyen has devoted her career to studying astrophysics and the life cycles of stars.
The university’s new astrophysics lab houses one of the most powerful telescopes in the country.
✦ late 19th century: from astro- ‘star’ + physics, patterned after the earlier French astrophysique.
