Core worlds

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Core worlds or core planets often exist in 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 core worlds.

A core world that is also the birthplace of the given race is often known as homeworld or homeplanet. For example, Earth is the homeworld of the human race. Note that sometimes a homeworld can be a former core world - especially once its natural resources are depleted, and much population emigrates to search for life in space colonies.

Some universes including core worlds:

• Homeworld is a prime example of a science fiction universe with a core-world, seeing as Hiigara, the homeworld and cradle of the Hiigarians, is the world which the game is based around.
• Star Wars, the Core Worlds are the known worlds, or planetary systems, that are near the core of the Star Wars galaxy.
• Star Trek, where the Core Worlds include planets such as Earth and Vulcan
• Firefly seems to take place in a single solar system, but with an extremely high number of habitable planets and moons; there exists 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.
• Solarian League in Honorverse also has core worlds consisting of Earth and its oldest colonies, with Earth being the capital.