Extragalactic research is the study of objects and phenomena outside of our own Milky Way galaxy. This area of research includes the study of other galaxies, galaxy clusters, quasars, and other extragalactic objects. Researchers in this field use a variety of observational techniques, such as telescopes and satellites, to study the properties and behavior of these distant objects. Extragalactic research helps us to better understand the structure and evolution of the universe as a whole, as well as the processes that shape the formation and behavior of galaxies and other extragalactic objects.