Artificial worlds or artificial planets have been created by writers in the fields of science speculation, speculative fiction and fiction. Such

megastructure A megastructure is a very large artificial object, although the limits of precisely how large vary considerably. Some apply the term to any especially large or tall building. Some sources define a megastructure as an enormous self-supporting a ...

s could have a variety of advantages over natural

planet A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a ...

s, such as efficient use of solar energy and immense living space, but their construction and/or maintenance would require technologies so much more advanced than those of 21st-century Earth that it is currently unknown if they are even achievable. It was often stated, that it is more possible to build a 2-gigaton Dyson sphere than a laser rifle, but still ringworlds etc. are treated in sci-fi as symbol of immense power, often relic of Precursor civilization or symbol of all-powerful future empire. Examples of artificial worlds include: * Culture Orbitals * Dyson spheres *

Globus Cassus Globus Cassus is an art project and book by Swiss architect and artist Christian Waldvogel presenting a conceptual transformation of planet Earth into a much bigger, hollow, artificial world with an ecosphere on its inner surface. It was the Swi ...

Ringworld ''Ringworld'' is a 1970 science fiction novel by Larry Niven, set in his Known Space universe and considered a classic of science fiction literature. ''Ringworld'' tells the story of Louis Wu and his companions on a mission to the Ringworld, a ...

The main plot of the Neill Blomkamp science fiction action movie Elysium focuses on a dystopian future where the poor live on a post apocalyptic Earth in ruins, working in nightmarish city conditions and patrolled by robotic officers while the rich live on a

Stanford torus The Stanford torus is a proposed NASA design for a space habitat capable of housing 10,000 to 140,000 permanent residents. The Stanford torus was proposed during the 1975 NASA Summer Study, conducted at Stanford University, with the purpose o ...

design man made planet known as Elysium that hovers just above Earth that has many technological pleasures and machines that can fix almost any health ailment known to man. In Douglas Adams' Hitchhiker's Guide To The Galaxy, an advanced race referred to as the Magratheans designed and built planets for the wealthy inhabitants of the galaxy, and the book went on to theorize that the Magratheans also designed and built Earth. In

Star Wars Legends ''Star Wars'' has been expanded to media other than the original films. This spin-off material is licensed and moderated by Lucasfilm, though during his involvement with the franchise ''Star Wars'' creator George Lucas reserved the right to bot ...

continuity, a race called the Celestials (not to be confused with the Celestials of

Marvel Comics Marvel Comics is an American comic book publisher and the flagship property of Marvel Entertainment, a divsion of The Walt Disney Company since September 1, 2009. Evolving from Timely Comics in 1939, ''Magazine Management/Atlas Comics'' in 19 ...

) using Centerpoint Station, built the Corellian System.

See also