The term "extragalactic" refers to anything that exists outside of our own galaxy, the Milky Way. This includes other galaxies, cosmic structures, and phenomena that are not part of our galactic system. Extragalactic studies help astronomers understand the universe's vastness and the formation and evolution of galaxies. Astronomers use various tools, such as telescopes, to observe extragalactic objects like the Andromeda Galaxy and Quasars. These observations provide insights into the behavior of galaxies, the distribution of dark matter, and the overall structure of the universe. Understanding extragalactic phenomena is crucial for grasping the cosmos beyond our immediate surroundings.