Astrophysics is a branch of astronomy that focuses on understanding the physical properties and behavior of celestial bodies and the universe as a whole. It combines principles from physics and chemistry to explore phenomena such as black holes, neutron stars, and the Big Bang. By studying the light emitted from stars and galaxies, astrophysicists can uncover the composition, temperature, distance, and motion of these celestial objects. This field not only helps us understand the universe's origins but also its ultimate fate, revealing the intricate workings of the cosmos.