What is another word for island universe?
Pronunciation: [ˈa͡ɪlənd jˈuːnɪvˌɜːs] (IPA) 
Island universe refers to a self-contained, vast system of stars and other celestial bodies. It is also known as a galaxy. Synonyms for island universe include galactic system, celestial cluster, star system, and cosmic neighborhood. Other terms that are sometimes used to describe the idea of an island universe include cosmic society, stargazing realm, and celestial neighborhood. While the term "island universe" was originally used to refer specifically to our own Milky Way galaxy, it has since come to be applied to all galaxies. The term is meant to evoke a sense of isolation of each galaxy, as though it is an island unto itself in the vastness of space.
