In the Star Wars fictional universe, the Core Worlds are the known worlds, or planetary systems, that are near the core of the Star Wars galaxy. These worlds are rumored to be the first planets in the Star Wars universe to hold human life. These humans expanded and formed the Old Republic. Coruscant is by far the most important of the Core worlds and is, according to legend, the source of the first humans. However, there are numerous other worlds which can be found in this dense region of the galaxy. The Core can be divided into three regions: The Deep Core, the Core Proper and the Colonies (sometimes considered a separate region). The Deep Core is the location of the Koornacht Cluster, Byss, Ebaq and countless other worlds; so many, in fact, that hyperspace travel through the Core is tedious and even treacherous. It was to Byss that the dissembodied conciousness of Emperor Palpatine escaped to in the years following his death at Endor. The Core Worlds are millions of systems, including Coruscant, Alderaan, Corellia, Chandrilla, Nubia, Duro, and Ciutric. Less dense than the Deep Core, the Core Worlds are the center of commerce and society in the galaxy as they lie on the intersection of the many great hyperspace lanes. The Colonies include Commenor, Nemoidia, and Bilbringi,as well as numerous other worlds which have served as stage for the great Galactic Civil War in the fight between the Empire and the Rebel Alliance. Star Wars began with a 13-page treatment for a space adventure movie which George Lucas drafted in 1973, inspired from multiple myths and classic stories. ... A fictional universe is a cohesive imaginary world that serves as the setting or backdrop for one or (more commonly) multiple works of fiction. ... Form of Government Federal Republic--Unicameral--Parliamentary Official language Basic Capital Coruscant Judicial Branch Supreme Court Legislative and Executive Branch Galactic Senate Senate Chair and Head of State Supreme Chancellor Assistant Senate Head Vice Chair Establishment 25,000 BBY Reorganization into the Galactic Empire 19 BBY Re-establishment 5 ABY... Distance from Core 0 light years Region Core Worlds Oversector Imperial Center Oversector (during Imperial rule) Sector/System Coruscant Orbital period 368 days Rotation period 24 hours Number of suns 1 Number of moons 4 (Two were pulverized by the Yuuzhan Vong) Population 1 trillion+ (according to literature) Points of... In the Star Wars fictional universe, the Deep Core is at the center of the galaxy. ... The Colonies are a region in the Star Wars galaxy The Colonies were some of the first planets settled outside the Core Worlds by the Republic. ...

Core worlds or core planets often exist in other works of science-fiction, especially space operas. They are usually at the center of the galaxy or of colonized space, occasionally both. Core worlds are densely populated with long histories, advanced technology, and/or highly-developed culture. The capital planets of galactic empires are often a core world. Some universes including core worlds: A collection of well-known science-fiction novels and magazines Science fiction is the term given to speculative fiction placed in a universe with science and technology different from our own. ... Space opera is a subgenre of speculative fiction or science fiction that emphasizes romantic adventure, interstellar travel, and space battles where the main storyline is centred around interstellar conflict and character drama. ... Galactic empires are a fairly common theme in science fiction. ...

• Star Trek, including planet such as Earth and Vulcan
• Firefly actually seems to take place in a single solar system, but with an extremely high number of habitable planets, there exist a distinct core worlds sector, including planets such as Ariel and Persephone.
• The Galactic Empire from the Foundation Series has a distinctive core, including the city planet Trantor, after which Star wars' Coruscant was modelled.
• The Galactic Imperium of the Padishah Emperors in Frank Herbert's Dune is not stated to have any particular structure, but the planet Kaitain is noted as the seat of power.