High-energy astrophysics is a branch of astronomy that studies celestial phenomena emitting high-energy radiation, such as gamma rays, X-rays, and cosmic rays. This field focuses on understanding extreme environments, like those found in black holes, neutron stars, and supernovae, where matter and energy interact under intense conditions. Researchers in high-energy astrophysics use advanced telescopes and detectors to observe these energetic events. By analyzing the radiation produced, scientists can learn about the fundamental processes governing the universe, including the formation of elements, the behavior of matter under extreme gravity, and the dynamics of cosmic explosions.