Artificial worlds or artificial planets have been created by writers in the fields of science speculation,

speculative fiction Speculative fiction is a term that has been used with a variety of (sometimes contradictory) meanings. The broadest interpretation is as a category of fiction encompassing genres with elements that do not exist in reality, recorded history, na ...

and

fiction Fiction is any creative work, chiefly any narrative work, portraying individuals, events, or places that are imaginary, or in ways that are imaginary. Fictional portrayals are thus inconsistent with history, fact, or plausibility. In a traditi ...

. 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 you ...

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 Precursor or Precursors may refer to: *Precursor (religion), a forerunner, predecessor ** The Precursor, John the Baptist Science and technology * Precursor (bird), a hypothesized genus of fossil birds that was composed of fossilized parts of unr ...

civilization or symbol of all-powerful future empire. Examples of artificial worlds include: * Culture Orbitals *

Dyson sphere A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its solar power output. The concept is a thought experiment that attempts to explain how a spacefaring civilization would meet ...

s * Globus Cassus *

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 Neill Blomkamp (; born 17 September 1979) is a South African filmmaker. He employs a documentary-style, Hand-held camera, hand-held, cinéma vérité technique, blending naturalistic and photo-realistic computer-generated imagery, computer-gene ...

science fiction action movie

Elysium Elysium (, ), otherwise known as the Elysian Fields ( grc, Ἠλύσιον πεδίον, ''Ēlýsion pedíon'') or Elysian Plains, is a conception of the afterlife that developed over time and was maintained by some Greek religious and philos ...

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 ''The Hitchhiker's Guide to the Galaxy'' (sometimes referred to as ''HG2G'', ''HHGTTG'', ''H2G2'', or ''tHGttG'') is a comedy science fiction franchise created by Douglas Adams. Originally a 1978 radio comedy broadcast on BBC Radio 4, it w ...

, 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 publishing, 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 Co ...

) using Centerpoint Station, built the Corellian System.

See also