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- Bigger_Than_Worlds abstract ""Bigger Than Worlds" is an essay by the American science fiction writer Larry Niven (born 1938). It was first published in March 1974 in Analog magazine, and has been anthologized in A Hole in Space (1974) and in Playgrounds of the Mind (1991). It reviews a number of proposals, not inconsistent with the known laws of physics, which have been made for habitable artificial astronomical megastructures.After an introduction saying that everyone may not always live on a single planet, the essay is divided into (mostly short) sections having the following titles and brief descriptions: The Multi-Generation ShipA generation ship is a slower-than-light spaceship housing some hundreds of people which takes several human generations to complete its journey. It could in principle be built using known technology. GravityNiven can conceive of four ways of generating artificial gravity in a spaceship: (1) centrifugal force; (2) adding mass, e.g. neutronium or a black hole (this would incur serious penalties in fuel consumption); (3) gravity waves; and (4) continuous linear acceleration to the midway point of a journey, followed by continuous deceleration. Flying CitiesThese were proposed by James Blish (1921–75) in his novel sequence Cities in Flight (1956–62); they used an as-yet-undiscovered means of propulsion. As an alternative to Blish's idea of launching existing cities into space, Niven proposes a giant annular spaceship, which rotates to generate artificial gravity. Inside OutsideThis describes a hollowed-out planetoid, with living quarters inside. Macro-LifeAny of the foregoing could be made self-sufficient and a permanent habitation, enlarged by materials obtained from planetary systems. WorldsNiven introduces the concept of engineering and terraforming whole planets. Dyson SpheresA Dyson sphere is a hollow spherical megastructure that completely encompasses a star. The inside surface is inhabited. The structure need not be a complete sphere; as, for example, in Niven's novel Ringworld (1970). A star could be provided with rings of different diameters each occupying a different plane. Dyson Spheres IIAs alternative to the gravity generators used in Ringworld, a Dyson structure could rotate to generate artificial gravity. Alternatively, one could do without gravity and live in free fall by inhabiting the space between two concentric Dyson spheres. Hold It A MinuteThe mathematics are plausible; the materials of construction are unknown. The DiscAn Alderson disk is a platter of diameter similar to that of the orbits of Mars or Jupiter, with a star occupying a hole in its center. Cosmic MacaroniIn a topopolis, a star is surrounded by a toroidal tube, which rotates around its internal circular axis to generate artificial gravity by centrifugal force. The structure need not be circular: it could be more complex, consisting of multiple loops around the star. The MegasphereA Dyson sphere contains the heart of a galaxy. The outside surface is the biosphere; the stars inside the source of energy. Surface gravity is minute, so that ability to live in free fall would be necessary. The atmosphere would not thin out for scores of light-years, so that structures such as ringworlds could be installed around the megasphere itself.Finally, Niven notes that a rotating ringworld equipped with conducting surfaces could set up enormous magnetic forces acting on the star, which could be used to control its burning and to force it to emit a jet of gas along the system's axis. The star would become its own space drive, towing the ringworld along by gravity. By the time the star was used up, the system would be moving at sufficient speed to use interstellar gas as fuel for a Bussard ramjet. Such a megastructure would be impossible to land, and only useful if fleeing a galaxy-wide disaster.".
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- Bigger_Than_Worlds wikiPageWikiLink A_Hole_in_Space.
- Bigger_Than_Worlds wikiPageWikiLink Alderson_disk.
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- Bigger_Than_Worlds wikiPageWikiLink Bussard_ramjet.
- Bigger_Than_Worlds wikiPageWikiLink Category:1974_short_stories.
- Bigger_Than_Worlds wikiPageWikiLink Category:Essays_by_Larry_Niven.
- Bigger_Than_Worlds wikiPageWikiLink Category:Exploratory_engineering.
- Bigger_Than_Worlds wikiPageWikiLink Category:Megastructures.
- Bigger_Than_Worlds wikiPageWikiLink Centrifugal_force.
- Bigger_Than_Worlds wikiPageWikiLink Cities_in_Flight.
- Bigger_Than_Worlds wikiPageWikiLink Dyson_sphere.
- Bigger_Than_Worlds wikiPageWikiLink Essay.
- Bigger_Than_Worlds wikiPageWikiLink Free_fall.
- Bigger_Than_Worlds wikiPageWikiLink Generation_ship.
- Bigger_Than_Worlds wikiPageWikiLink Gravity_wave.
- Bigger_Than_Worlds wikiPageWikiLink James_Blish.
- Bigger_Than_Worlds wikiPageWikiLink Jupiter.
- Bigger_Than_Worlds wikiPageWikiLink Larry_Niven.
- Bigger_Than_Worlds wikiPageWikiLink Light-year.
- Bigger_Than_Worlds wikiPageWikiLink Mars.
- Bigger_Than_Worlds wikiPageWikiLink Megastructure.
- Bigger_Than_Worlds wikiPageWikiLink Minor_planet.
- Bigger_Than_Worlds wikiPageWikiLink Neutronium.
- Bigger_Than_Worlds wikiPageWikiLink Novel_sequence.
- Bigger_Than_Worlds wikiPageWikiLink Planetoid.
- Bigger_Than_Worlds wikiPageWikiLink Playgrounds_of_the_Mind.
- Bigger_Than_Worlds wikiPageWikiLink Ringworld.
- Bigger_Than_Worlds wikiPageWikiLink Science_fiction.
- Bigger_Than_Worlds wikiPageWikiLink Terraforming.
- Bigger_Than_Worlds wikiPageWikiLink Topopolis.
- Bigger_Than_Worlds wikiPageWikiLink Torus.
- Bigger_Than_Worlds wikiPageWikiLinkText "Bigger Than Worlds".
- Bigger_Than_Worlds hasPhotoCollection Bigger_Than_Worlds.
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- Bigger_Than_Worlds subject Category:1974_short_stories.
- Bigger_Than_Worlds subject Category:Essays_by_Larry_Niven.
- Bigger_Than_Worlds subject Category:Exploratory_engineering.
- Bigger_Than_Worlds subject Category:Megastructures.
- Bigger_Than_Worlds hypernym Essay.
- Bigger_Than_Worlds type Book.
- Bigger_Than_Worlds comment ""Bigger Than Worlds" is an essay by the American science fiction writer Larry Niven (born 1938). It was first published in March 1974 in Analog magazine, and has been anthologized in A Hole in Space (1974) and in Playgrounds of the Mind (1991).".
- Bigger_Than_Worlds label "Bigger Than Worlds".
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- Bigger_Than_Worlds sameAs Q20313313.
- Bigger_Than_Worlds sameAs Q20313313.
- Bigger_Than_Worlds wasDerivedFrom Bigger_Than_Worlds?oldid=676766672.
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