Floating city (science fiction)
Encyclopedia
In science fiction
Science fiction
Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

, floating cities are settlements that strictly use buoyancy
Buoyancy
In physics, buoyancy is a force exerted by a fluid that opposes an object's weight. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus a column of fluid, or an object submerged in the fluid, experiences greater pressure at the bottom of the...

 to remain in the atmosphere of a planet. However the term generally refers to any city that is flying, hovering, or otherwise suspended in the air via any means technological or even magical.

Earth

In Jonathan Swift
Jonathan Swift
Jonathan Swift was an Irish satirist, essayist, political pamphleteer , poet and cleric who became Dean of St...

's satirical novel
Novel
A novel is a book of long narrative in literary prose. The genre has historical roots both in the fields of the medieval and early modern romance and in the tradition of the novella. The latter supplied the present generic term in the late 18th century....

 Gulliver's Travels
Gulliver's Travels
Travels into Several Remote Nations of the World, in Four Parts. By Lemuel Gulliver, First a Surgeon, and then a Captain of Several Ships, better known simply as Gulliver's Travels , is a novel by Anglo-Irish writer and clergyman Jonathan Swift that is both a satire on human nature and a parody of...

, Swift envisioned Laputa
Laputa
Laputa is a fictional place from the book Gulliver's Travels by Jonathan Swift.Laputa is a fictional flying island or rock, about 4.5 miles in diameter, with an adamantine base, which its inhabitants can maneuver in any direction using magnetic levitation...

, an island city that floated in the sky. The island was suggested to levitate above the Earth by use of the force of magnetism
Magnetism
Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. Ferromagnetism is the strongest and most familiar type of magnetism. It is responsible for the behavior of permanent magnets, which produce their own persistent magnetic fields, as well...

. In the 1920s, Hugo Gernsback
Hugo Gernsback
Hugo Gernsback , born Hugo Gernsbacher, was a Luxembourgian American inventor, writer, editor, and magazine publisher, best remembered for publications that included the first science fiction magazine. His contributions to the genre as publisher were so significant that, along with H. G...

 speculated about floating cities of the future, suggesting that 10,000 years hence "the city the size of New York will float several miles above the surface of the earth, where the air is cleaner and purer and free from disease carrying bacteria." To stay in the air, "four gigantic generators will shoot earthward electric rays which by reaction with the earth produce the force to keep the city aloft."

Laputa (although uninhabited) is shown in Hayao Miyazaki
Hayao Miyazaki
is a Japanese manga artist and prominent film director and animator of many popular anime feature films. Through a career that has spanned nearly fifty years, Miyazaki has attained international acclaim as a maker of animated feature films and, along with Isao Takahata, co-founded Studio Ghibli,...

's Castle in the Sky
Castle in the Sky
All compositions by Joe Hisaishi.#"The Girl Who Fell from the Sky" – 2:27#"Morning in Slag Ravine" – 3:04#"A Fun Brawl " – 4:27#"Memories of Gondoa" – 2:46#"Discouraged Pazu" – 1:46#"Robot Soldier " – 2:34...

.

Although Swift's proposal was intended as satire, Buckminster Fuller
Buckminster Fuller
Richard Buckminster “Bucky” Fuller was an American systems theorist, author, designer, inventor, futurist and second president of Mensa International, the high IQ society....

 proposed the concept more seriously in the form of the Cloud nine (Tensegrity sphere)
Cloud nine (Tensegrity sphere)
Cloud nine is the name Buckminster Fuller gave to his proposed airborne habitats created from giant geodesic spheres, which might be made to levitate by slightly heating the air inside above the ambient temperature....

 megastructure
Megastructure
A megastructure is a very large manmade object, though the limits of precisely how large this is vary considerably. Some apply the term to any especially large or tall building....

, in which he envisioned structural spheres that float freely in the sky, allowing passengers a migratory lifestyle and a solution to the depletion of Earth's resources. He proposed a 1 miles (1.6 km) geodesic sphere
Geodesic dome
A geodesic dome is a spherical or partial-spherical shell structure or lattice shell based on a network of great circles on the surface of a sphere. The geodesics intersect to form triangular elements that have local triangular rigidity and also distribute the stress across the structure. When...

 that would be heated by sunlight, functioning as a thermal airship
Thermal airship
A thermal airship is an airship that generates its lift via the difference in density due to a temperature differential between the gas inside its envelope and the ambient air. Currently all thermal airships use hot air, as used in a hot air balloon, as their lifting gas...

.

Venus

A design similar to Fuller's Cloud Nine might permit habitation in the upper atmosphere of Venus
Venus
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

, where at ground level the temperature is too hot and the atmospheric pressure
Atmospheric pressure
Atmospheric pressure is the force per unit area exerted into a surface by the weight of air above that surface in the atmosphere of Earth . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point...

 too great. As proposed by Geoffrey A. Landis, the easiest planet (other than Earth) to place floating cities at this point would appear to be Venus
Venus
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows...

. Because the thick carbon dioxide atmosphere
Atmosphere of Venus
The atmosphere of Venus is much denser and hotter than that of Earth. The temperature at the surface is 740 K , while the pressure is 93 bar. The Venusian atmosphere supports opaque clouds made of sulfuric acid, making optical Earth-based and orbital observation of the surface impossible...

 is 50% denser than air, breathable air (21:79 Oxygen-Nitrogen mixture) is a lifting gas in the dense Venusian atmosphere, with over 60% of the lifting power that helium
Helium
Helium is the chemical element with atomic number 2 and an atomic weight of 4.002602, which is represented by the symbol He. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table...

 has on Earth. In effect, a balloon
Gas balloon
A gas balloon is any balloon that stays aloft due to being filled with a gas less dense than air or lighter than air . A gas balloon may also be called a Charlière for its inventor, the Frenchman Jacques Charles. Today, familiar gas balloons include large blimps and small rubber party balloons...

 full of human-breathable air would sustain itself and extra weight (such as a colony) in midair. This means that any large structure filled with air would float on the carbon dioxide
Carbon dioxide
Carbon dioxide is a naturally occurring chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom...

, with the air's natural buoyancy counteracting the weight of the structure itself.

At an altitude of 50 km above the Venusian surface, the environment is the "most Earthlike in the solar system", with a pressure of approximately 1 bar and temperature
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...

s in the 0°C-50°C range. Because there is not a significant pressure difference between the inside and the outside of the breathable-air balloon, any rips or tears would cause gases to diffuse
Gaseous diffusion
Gaseous diffusion is a technology used to produce enriched uranium by forcing gaseous uranium hexafluoride through semi-permeable membranes. This produces a slight separation between the molecules containing uranium-235 and uranium-238 . By use of a large cascade of many stages, high separations...

 at normal atmospheric mixing rates, giving time to repair any such damage. In addition, humans would not require pressurized suits when outside, merely air to breathe and a protection from the acidic rain.

Since such colonies would be viable in current Venusian conditions, this allows a dynamic approach to colonization instead of requiring extensive terraforming measures in advance. The main challenge would be using a substance resistant to sulfuric acid
Sulfuric acid
Sulfuric acid is a strong mineral acid with the molecular formula . Its historical name is oil of vitriol. Pure sulfuric acid is a highly corrosive, colorless, viscous liquid. The salts of sulfuric acid are called sulfates...

 to serve as the structure's outer layer; ceramic
Ceramic
A ceramic is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous...

s or metal sulfate
Sulfate
In inorganic chemistry, a sulfate is a salt of sulfuric acid.-Chemical properties:...

s could possibly serve in this role. (The sulfuric acid itself may prove to be the main motivation for creating the structure in the first place, as the acid has proven to be extremely useful for many different purposes.)

Other Planets

In addition to Venus, floating cities have been proposed in science fiction on several other planets. For example, floating cities might also permit settlement of the outer three gas giant
Gas giant
A gas giant is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus, and Neptune...

s, as the gas giants lack solid surfaces. Jupiter
Jupiter
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...

 is not promising for habitation due to its high gravity, escape velocity
Escape velocity
In physics, escape velocity is the speed at which the kinetic energy plus the gravitational potential energy of an object is zero gravitational potential energy is negative since gravity is an attractive force and the potential is defined to be zero at infinity...

 and radiation
Radiation
In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing...

, but the solar system
Solar System
The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun...

's other gas giants (Saturn
Saturn
Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn is named after the Roman god Saturn, equated to the Greek Cronus , the Babylonian Ninurta and the Hindu Shani. Saturn's astronomical symbol represents the Roman god's sickle.Saturn,...

, Uranus
Uranus
Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. It is named after the ancient Greek deity of the sky Uranus , the father of Cronus and grandfather of Zeus...

, and Neptune
Neptune
Neptune is the eighth and farthest planet from the Sun in the Solar System. Named for the Roman god of the sea, it is the fourth-largest planet by diameter and the third largest by mass. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times...

) may be more practical. In 1978, the British Interplanetary Society
British Interplanetary Society
The British Interplanetary Society founded in 1933 by Philip E. Cleator, is the oldest space advocacy organisation in the world whose aim is exclusively to support and promote astronautics and space exploration.-Structure:...

's Project Daedalus
Project Daedalus
Project Daedalus was a study conducted between 1973 and 1978 by the British Interplanetary Society to design a plausible unmanned interstellar spacecraft. Intended mainly as a scientific probe, the design criteria specified that the spacecraft had to use current or near-future technology and had to...

 envisioned floating factories in the atmospheres of Jupiter refining Helium-3
Helium-3
Helium-3 is a light, non-radioactive isotope of helium with two protons and one neutron. It is rare on Earth, and is sought for use in nuclear fusion research...

 to produce fuel for an interstellar probe
Interstellar probe
An interstellar probe is a space probe that has left—or is expected to leave—the Solar System and enter interstellar space, typically defined as the region beyond the heliopause...

. Michael McCollum notes that the "surface" gravity of Saturn
Saturn
Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn is named after the Roman god Saturn, equated to the Greek Cronus , the Babylonian Ninurta and the Hindu Shani. Saturn's astronomical symbol represents the Roman god's sickle.Saturn,...

 (that is, at the visible cloud layer, where the atmospheric pressure is about the same as Earth's) is very close to that of Earth, and in his novel The Clouds of Saturn, he envisioned cities floating in the Saturnian atmosphere, where the buoyancy is provided by envelopes of hydrogen
Hydrogen
Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...

 heated by fusion reactors. Uranus and Neptune also have "surface" gravities comparable to Earth's, and even lower escape velocities than Saturn. Cecelia Holland
Cecelia Holland
-Biography:She was born December 31, 1943 in Henderson, Nevada, and began writing at the age of twelve, recording the stories she made up for her own entertainment. From the beginning, her focus was on history because "being twelve, I had precious few stories of my own...

 populated Jupiter, Saturn and Uranus with mutant humans, the Styth, in floating cities in her only SF novel, Floating Worlds (1975).

Literature

  • The novel Orion Shall Rise
    Orion Shall Rise
    Orion Shall Rise is a science fiction novel by Poul Anderson as part of his Maurai series, published in 1983.The novel is set several hundred years after a devastating nuclear war which has pushed back the level of technology....

    by Poul Anderson
    Poul Anderson
    Poul William Anderson was an American science fiction author who began his career during one of the Golden Ages of the genre and continued to write and remain popular into the 21st century. Anderson also authored several works of fantasy, historical novels, and a prodigious number of short stories...

     features an aerostat
    Aerostat
    An aerostat is a craft that remains aloft primarily through the use of buoyant lighter than air gases, which impart lift to a vehicle with nearly the same overall density as air. Aerostats include free balloons, airships, and moored balloons...

     city called Skyholm, located above present-day France
    France
    The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

    .
  • In the novel The Ringworld Engineers
    The Ringworld Engineers
    The Ringworld Engineers is a 1980 science fiction novel by Larry Niven. It is the first sequel to Niven's award-winning Ringworld and was nominated for both the Hugo and Locus Awards in 1981.-Origin:...

    , Louis Wu
    Louis Wu
    Louis Gridley Wu, a fictional character, is the main protagonist in the Ringworld series of books, written by Larry Niven.Louis Wu was born in 2650 to Carlos Wu and Sharrol Janss. When he appears in Ringworld, Louis is 6'2" tall...

     seeks a way to save the Ringworld by bartering for information in the library of a floating city.
  • Airhaven is a floating city in the Mortal Engines Quartet, that, through attaching gas bags, lifted itself into the air to avoid cities trying to eat it according to Municipal Darwinism
    Municipal Darwinism
    Municipal Darwinism is a fictional concept featured in Philip Reeve's Mortal Engines Quartet. It refers to the practice in the post apocalyptic world described in the series, in which large mobile metropolitan areas, known as Traction Cities, consume one another by gathering other, smaller cities...

    .
  • There are numerous floating habitats on the Venus-like planet Chilo
    Chilo
    Chilo may refer to:*Chilo of Sparta, one of the Seven Sages of Greece*Chilo, Ohio, a village in Clermont County, Ohio*Chilo, Bhutan*Chilo , a genus of crambid moths...

     in Tobias S. Buckell
    Tobias S. Buckell
    Tobias S. Buckell is a Grenadian science fiction writer. His 2008 novel, Halo: The Cole Protocol, made the The New York Times Best Seller list. He currently lives in Bluffton, Ohio.-Biography:...

    's novel Sly Mongoose
    Sly Mongoose
    Sly Mongoose is the third science fiction novel of Caribbean writer Tobias S. Buckell. The novel is a standalone but is set in the same universe as Buckell's novels Crystal Rain and Ragamuffin. The novels are also linked by a recurring character....

    . Buckell credits Geoffrey A. Landis
    Geoffrey A. Landis
    Geoffrey A. Landis is an American scientist, working for the National Aeronautics and Space Administration on planetary exploration, interstellar propulsion, solar power and photovoltaics...

     with providing the background information on the floating cities.
  • Saga of Seven Suns
    Saga of Seven Suns
    The Saga of Seven Suns is a series of seven space opera novels written by Kevin J. Anderson and published between 2002 and 2008. The series is set in a not-too-distant future where mysterious alien benefactors, the Ildirans, have helped humanity to spread out among the stars, colonizing a number of...

    by Kevin J. Anderson
    Kevin J. Anderson
    Kevin J. Anderson is an American science fiction author with over forty bestsellers. He has written spin-off novels for Star Wars, StarCraft, Titan A.E., and The X-Files, and with Brian Herbert is the co-author of the Dune prequels...

     has giant, manned, gas mining platforms, that mine the Hydrogen necessary to, among other things, distill into ekti, a vital stardrive fuel.
  • Charles Stross
    Charles Stross
    Charles David George "Charlie" Stross is a British writer of science fiction, Lovecraftian horror and fantasy. He was born in Leeds.Stross specialises in hard science fiction and space opera...

    's novel Saturn's Children
    Saturn's Children (Stross novel)
    Saturn's Children is a 2008 science fiction novel by British author Charles Stross. Stross has said that it is "a space opera and late-period Heinlein tribute"...

    begins in a floating city on Venus.

Film and television

  • Cloud City on the planet Bespin
    Bespin
    Bespin is a fictional planet, a gas giant in Star Wars films and books. The planet was first seen in the 1980 feature film Star Wars Episode V: The Empire Strikes Back...

    , in the Star Wars universe.
  • Stratos, on the planet Ardana, in Star Trek
    Star Trek: The Original Series
    Star Trek is an American science fiction television series created by Gene Roddenberry, produced by Desilu Productions . Star Trek was telecast on NBC from September 8, 1966, through June 3, 1969...

     episode "The Cloud Minders".
  • In Firefly
    Firefly (TV series)
    Firefly is an American space western television series created by writer and director Joss Whedon, under his Mutant Enemy Productions label. Whedon served as executive producer, along with Tim Minear....

    episode "Trash", the planet Bellerophon is the site of dozens of floating estates with "gracious living, ocean views and state-of-the-art security."
  • Atlantis
    Atlantis (Stargate)
    In the science fiction television series Stargate Atlantis, the spin-off of Stargate SG-1, Atlantis is a city-sized starship originally located in the Pegasus galaxy. Atlantis serves as the base of operations for the main characters, from which they explore other planets through the Stargate...

     from the Stargate universe is a probable example of a floating city. Although the city ship weighs several million tons, it is buoyant enough to float on water and, given that its energy shield can hold the atmosphere inside nearly indefinitely, it should be able to float in a particularly dense atmosphere.
  • The Nox of Stargate SG1 have floating cities.
  • Metro City in the Astro Boy (2009 film) is floating above the surface.
  • Hayao Miyazaki
    Hayao Miyazaki
    is a Japanese manga artist and prominent film director and animator of many popular anime feature films. Through a career that has spanned nearly fifty years, Miyazaki has attained international acclaim as a maker of animated feature films and, along with Isao Takahata, co-founded Studio Ghibli,...

    's films Castle in the Sky
    Castle in the Sky
    All compositions by Joe Hisaishi.#"The Girl Who Fell from the Sky" – 2:27#"Morning in Slag Ravine" – 3:04#"A Fun Brawl " – 4:27#"Memories of Gondoa" – 2:46#"Discouraged Pazu" – 1:46#"Robot Soldier " – 2:34...

    and Howl's Moving Castle
    Howl's Moving Castle (film)
    is a 2004 Japanese animated fantasy film written and directed by Hayao Miyazaki of Studio Ghibli and based on the novel of the same name by Diana Wynne Jones...

    both involve floating structures similar to a floating city.
  • In the anime and manga One Piece
    One Piece
    is a Japanese shōnen manga series written and illustrated by Eiichiro Oda. It has been serialized in Weekly Shōnen Jump since August 4, 1997; the individual chapters are being published in tankōbon volumes by Shueisha, with the first released on December 24, 1997, and the 64th volume released as...

     there are Sky Islands, cities built on a specific type of cloud that has hard, land-like properties, allowing civilizations to have ground to traverse and build on using the same cloud material, along with an ocean-like cloud throughout, making it a close parallel to a normal earthbound island. The unique environment of the Grand Line, an equatorial ocean that circles the globe and possesses all matter of mythical weather patterns, islands and equally mythical sea-behemoths, allows for these Sky Islands to occur regularly- yet are so rarely witnessed even the denizens of the legendary Grand-Line perceive them as a myth.

Games

  • City in the Sky, the seventh dungeon level of The Legend of Zelda: Twilight Princess
    The Legend of Zelda: Twilight Princess
    is an action-adventure game developed by Nintendo Entertainment Analysis and Development, and published by Nintendo for the GameCube and Wii video game consoles. It is the thirteenth installment in The Legend of Zelda series...

    .
  • SkyTown is a floating city on planet Elysia in Metroid Prime 3: Corruption
    Metroid Prime 3: Corruption
    Metroid Prime 3: Corruption is a first-person action-adventure game developed by Retro Studios and published by Nintendo for the Wii video game console. It is the tenth game in the Metroid series, and the final entry in the Metroid Prime trilogy—excluding two spin-off titles. It was released in...

    from the Metroid video game series.
  • New Pork City, the last stage in the 2006 videogame Mother 3
    Mother 3
    Mother 3 is a role-playing video game developed by Nintendo, Brownie Brown and HAL Laboratory, and published for the Game Boy Advance handheld game console. It has only been released in Japan, alongside a limited supply bundle. It is the third video game in the Mother series, following EarthBound...

    .
  • There are several floating cities in the games Skies of Arcadia
    Skies of Arcadia
    Skies of Arcadia, released in Japan as , is a console role-playing game developed by Overworks for the Dreamcast and published by Sega in 2000. Skies of Arcadia Legends, a port, was released for the GameCube in 2002. Legends was also in development for the PlayStation 2; however, the PS2 version...

     for the Dreamcast and Skies of Arcadia Legends for the Nintendo GameCube
    Nintendo GameCube
    The , officially abbreviated to NGC in Japan and GCN in other regions, is a sixth generation video game console released by Nintendo on September 15, 2001 in Japan, November 18, 2001 in North America, May 3, 2002 in Europe, and May 17, 2002 in Australia...

    .
  • In World of Warcraft
    World of Warcraft
    World of Warcraft is a massively multiplayer online role-playing game by Blizzard Entertainment. It is the fourth released game set in the fantasy Warcraft universe, which was first introduced by Warcraft: Orcs & Humans in 1994...

    , Dalaran is a major city that floats above Crystalsong Forest in the center of Northrend.
  • The setting of the Eclipse Phase
    Eclipse Phase (role-playing game)
    Eclipse Phase is a science fiction horror role-playing game with transhumanist themes. Futurist Anders Sandberg noted its difference from GURPS Transhuman Space was its emphasis on posthuman characters...

    role-playing game includes floating cities on Venus and Saturn.
  • Columbia, the setting for the game BioShock Infinite
    BioShock Infinite
    BioShock Infinite is an upcoming first-person shooter video game, and the third game in the BioShock series. Previously known as "Project Icarus", it is being developed by Irrational Games for a 2012 release on the Microsoft Windows, PlayStation 3 and Xbox 360 platforms...

    .
  • Angel Island is a floating island (Sonic 3 and Knuckles)
  • Final Fantasy XII
    Final Fantasy XII
    is a console role-playing video game developed and published by Square Enix for the PlayStation 2. Released in 2006, it is the twelfth title in the Final Fantasy series and the last in the series to be released exclusively on the PlayStation platform...

    has several in the form of solid earth islands suspended in the air by mystically charged stones inherent to the earth making up the foundation of the floating city, with Bhujerba being the only one visited and seen firsthand in the game.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK