The fictional universe of the Star Wars franchise primarily takes place in a central galaxy that serves as the principal setting for its films, television, and multimedia installments. Originally established by George Lucas as a "galaxy far, far away", it comprises numerous fictitious planets, moons, star systems, and species. The galaxy is divided into four broad sub-regions: the Core Worlds, Mid Rim, Outer Rim, and Unknown Regions. Notable planets include Coruscant, an ecumenopolis in the Core that functions as a political and cultural center, and Tatooine, a desert planet located in the Outer Rim. The universe initially encompassed a shared collection of works recognized as canon by Lucasfilm as part of the official Star Wars storyline. Following the franchise's acquisition by Disney, subsequent expanded material in other media was later rebranded as the Legends universe, declaring it non-canonical to the official universe.
Within this fictional body exists a variety of intelligent species, including humans, Twi’leks, Wookiees, Rodians, and Hutts, as well as several major governing bodies throughout galactic history, such as the Galactic Republic, Galactic Empire, Rebel Alliance, New Republic, and First Order. Each of these entities operates under differing political structures, ranging from democratic institutions to totalitarian regimes. Interstellar travel is facilitated by hyperspace, allowing rapid movement between distant star systems. A central metaphysical concept in the Star Wars universe is the Force, an omnipresent energy field that connects all living things. The Force is divided into two principal aspects: the Light Side, traditionally followed by the Jedi Order, and the Dark Side, embraced by the Sith. The universe also features a high level of technological advancement, including starships, droids, and energy-based weapons such as blasters and lightsabers. The timeline of in-universe events is often measured in reference to the Battle of Yavin, a pivotal conflict depicted in the original 1977 film, serving as a chronological anchor for subsequent developments in the franchise.
Conception and design George Lucas began developing what would become Star Wars in the early 1970s while seeking to construct a large-scale narrative that drew on historical models and elements of classical mythology rather than contemporary science fiction convention; the resulting conception of a large and intricate fictional galaxy worked, in essence, to create a type of "modern myth". In interviews and production notes, Lucas described his interest in adapting mythic structures to a modern cinematic setting, an approach shaped in part by his reading of Joseph Campbell’s work on comparative mythology. Campbell’s analysis of recurring heroic patterns informed Lucas’s early story outlines, while philosophical traditions such as Taoism and Buddhism contributed to the formulation of the Force as a unifying principle structured around opposing tendencies: a moral dichotomy between light and dark sides. As the project moved toward production, Lucas worked closely with concept artists Ralph McQuarrie and Joe Johnston to establish the visual character of the setting. Their designs emphasized environments and technology that appeared aged and functional rather than pristine, a deliberate departure from the sleek imagery common in earlier science fiction cinema. This approach, later described as a "used future," supported the portrayal of a galaxy shaped by long-term habitation, uneven technological development, and accumulated cultural history.
The expansion of the Star Wars universe beyond the original films began largely in the 1980s and 1990s through licensed novels, comics, sourcebooks, and games, collectively referred to as the Star Wars Expanded Universe (EU). These works added new characters, planets, events, and timelines, and were produced under a continuity framework managed by Lucas Licensing. While Lucas acknowledged aspects of the EU, he did not regard it as part of the central canon. Following Disney’s 2012 acquisition of Lucasfilm, the narrative structure of the franchise was reorganized. In 2014, Lucasfilm rebranded the Expanded Universe as Star Wars Legends, designating those works as non-canonical. A new unified canon was introduced, beginning with the six original films, the 2008 television series Star Wars: The Clone Wars, and all subsequent material produced under the direction of the Lucasfilm Story Group. The new canon was intended to maintain consistency across media formats, including film, television, publishing, and interactive platforms. Concepts and characters from the Legends continuity have been selectively reintroduced in updated forms within the current canon.
Astrography
The Galaxy
The Galaxy in Star Wars is depicted as a barred spiral galaxy estimated to span over 120,000 light-years in diameter, comprising millions of habitable star systems., ch. "The Galaxy, Stars, and Planets" Its structure is divided into several concentric regions that determine levels of technological development, political control, and cultural influence., ch. "The Political Galaxy" These regions, from the innermost to outermost, include the Deep Core, Core Worlds, Colonies, Inner Rim, Expansion Region, Mid Rim, Outer Rim Territories, Wild Space, and the Unknown Regions. Each region plays a distinct role in the political and economic dynamics of the galaxy, with the Core Worlds—such as Coruscant and Corellia—serving as major hubs of commerce and government., ch. "Corellia" and "Coruscant" In addition to regional delineations, the galaxy is subdivided into sectors, subsectors, and systems for administrative and navigational purposes., ch. "Systems, Sectors, Oversectors, and Regions" Sectors—such as the Seswenna Sector or the Kanz Sector—are composed of multiple star systems and often governed by a moff or senator, depending on the galactic government in power. This multi-tiered hierarchy supports localized governance and military deployment, particularly in the vast expanses of the Mid Rim and Outer Rim., ch. "Systems, Sectors, Oversectors, and Regions" In Star Wars: The Essentials Atlas (2009), Daniel Wallace and Jason Fry described the structure of the galaxy when writing: In another passage, Fry and Wallace explain the function of galactic coordinates in the Star Wars galaxy: The galactic capital, Coruscant, located in the Core Worlds near the Galactic Center, historically functions as the governing seat for major galactic governments including the Galactic Republic, Galactic Empire, New Republic, and Galactic Federation of Free Alliances throughout much of the Star Wars timeline. The Core is connected to the rest of the galaxy through established hyperspace routes—navigable corridors through the galaxy's gravitational wells and stellar hazards. These routes, such as the Corellian Run, Hydian Way, and Perlemian Trade Route, enable safe and efficient travel and have historically dictated the rise of trade centers and political alliances., ch. "Astrocartography, Navicomputers, and Trade Routes" Beyond the Outer Rim lies Wild Space, a partially charted frontier, and the Unknown Regions, a vast and largely unexplored expanse marked by navigational anomalies, gravitational distortions, and the absence of established hyperlanes. These areas serve as narrative frontiers for new threats and civilizations, such as the Chiss Ascendancy and remnants of the Sith Empire., ch. "The Chiss Ascendancy", ch. "The Outer Rim Territories"
Political structure According to Wallace and Fry, for a majority of the universe's chronology, the Galactic Republic and its successor regimes employed a succession of political and administrative structures intended to govern an extremely large, demographically diverse, and spatially dispersed polity. These structures evolved over time in response to expansion, administrative overload, corruption, and security crises, culminating in the replacement of legislative governance with centralized executive and military authority. For most of the galaxy's history, the Galactic Senate functioned as the primary legislative institution of the Republic and the nominal mechanism of galactic-scale democracy. While often celebrated as the ideological foundation of representative governance, the Senate was simultaneously characterized by procedural rigidity, the retention of obsolete rules, and chronic institutional inertia. Initial constitutional arrangements granted Senate representation to each sufficiently populated star system. This model was rapidly abandoned due to legislative paralysis, and representation was reorganized at the sector level. As sector-based representation expanded, the Senate grew to include millions of delegates, which threatened legislative functionality. Following his self-declaration as Emperor, Palpatine systematically dismantled the Senate's remaining authority. A parallel administrative hierarchy of Military Governors, Moffs, and Grand Moffs organized into subsectors, regions, and security oversectors was later established. This structure operated independently of the Senate and progressively absorbed executive, judicial, and military authority.
Under Imperial rule, planetary governors administered individual planets or entire star systems, reporting directly to a Moff. Governors were typically appointed from outside their assigned systems to prevent integration into local political structures. Local autonomy was generally tolerated unless it conflicted with Imperial objectives. Originally, sectors were composed of roughly fifty inhabited systems, but unchecked expansion led to millions of sectors of highly variable size. During declared emergencies, Republic law permitted the Chancellor to appoint governor-generals to coordinate military and Senatorial authority. Palpatine frequently invoked this provision during the Clone Wars and later formalized permanent executive control. Following the Empire's collapse, the restored Republic abolished the governor system, though it persisted in remnant Imperial territories., ch. "Systems, Sectors, Oversectors, and Regions" The largest territorial divisions within the Empire were regions, a designation with a long and varied history across galactic civilization. During the early centuries of the Republic's expansion, the government encountered numerous minor independent polities. Warlords who chose to join the Republic rather than resist it were often granted the title of Moff or Grand Moff over an Allied Region., ch. "Systems, Sectors, Oversectors, and Regions", part: "Regions" Only a few Allied Regions endured into the Imperial era, and most of these were small, localized areas in the Core or Colonies, such as the Ollonir Boundaries and the Botor Enclave.
Astronomical features Astrophysical phenomena in the Star Wars galaxy impose significant constraints on space travel in various franchise storylines., ch. "The Core Worlds" The Maw Cluster, a region near the Core Worlds characterized by multiple black holes, presents extreme gravitational forces that distort space and pose severe risks to starships., ch. "The Core Worlds" This location is prominently featured in Solo: A Star Wars Story as a notable navigational obstacle that surrounds the Kessel run, a hyperspace route connecting the planet Kessel to the Core Worlds. Ion storms, noted in systems like Hoth and Ryloth, emit electrical discharges capable of disabling spacecraft systems., ch. "Ryloth" Other hazards include gravitational rifts and subspace distortions that affect hyperspace route stability. These environmental conditions necessitate frequent astrographic updates and have influenced starship design in both canon and expanded universe materials.
Notable planets and moons