This study focuses on the discourse that orders and creates a logic of the extraterrestrial during postmodernity, what I term "Fringe." Using Foucault's notion of discourse, I define and theorize Fringe and its formation during postmodernity, looking at the particular features of the historical moment post-1960 that contributed to the creation and regulation of a particular extraterrestrial. I then investigate historical conceptions of the extraterrestrial from Aquinas to Kant. This genealogy of the extraterrestrial reveals a rich history of the extraterrestrial and compares this history with Fringe. After this I discuss two precursors of Fringe discourse: the Society for Psychical Research and the writings of anomalous researcher Charles Fort. This investigation of pre-Fringe notions of the psychical in discourse shows how the SPR and Fort's work both created new ways of looking at and speaking about phenomena falling outside the purview of "normal science" and contributed to the formation of Fringe while also being distinguishable from it. Finally, I analyze two popular iterations of Fringe discourse—the ancient aliens hypothesis and the abduction narrative—as popularized in the works of Erich von Däniken and Whitley Strieber.