Astrophysics is the branch of astronomy that deals with the physics of the universe, from the largest galaxies to the smallest particles. It is a relatively young field, having only been established as a separate discipline in the early 20th century.
Astrophysicists study a wide range of phenomena, including the Sun, stars, planets, galaxies, cosmology (the origin and evolution of the universe), and astrophysical fluids such as plasma. They use a variety of techniques and tools, including telescopes, satellites, computers, and particle accelerators.
The field of astrophysics is constantly evolving as new discoveries are made. Recent advances include the detection of gravitational waves from merging black holes, the discovery of thousands of exoplanets (planets orbiting other stars), and the study of dark matter and dark energy – two mysterious components that make up most of the mass and energy in the universe.
As we continue to explore our cosmic home, astrophysics will play an increasingly important role in helping us to understand our place in the universe.