Extragalactic Astronomy is the branch of astronomy that studies objects and phenomena outside our own galaxy, the Milky Way. This field focuses on various celestial bodies, including galaxies, quasars, and nebulae, as well as the large-scale structure of the universe. Researchers use powerful telescopes and advanced techniques to observe and analyze these distant objects. One of the key goals of extragalactic astronomy is to understand the formation and evolution of galaxies over time. By examining the light emitted from these distant objects, astronomers can gather information about their composition, distance, and movement. This knowledge helps us learn more about the universe's history and its expansion.