History Main / OneProductPlanet

* ''Blockaded'': World prohibited from trade, frequently with an enemy fleet enforcing the embargo. Smugglers and rebels would try to get pass the blockade for various reasons.

* ''[[HolyCity Holy World]]'': Place of major importance to a religion, often attracting pilgrims or a place of worship. If the religion is benign, attacking this center is a sign that you're an evil jackass. More fanatical sects would protect these centers.

[[folder: Primary Locations]]
* ''BigDumbObject'': Artifact of {{Precursors}}, often a massive construct such as a DysonSphere or [[RingWorldPlanet ringworld]]. Or recently made by a highly advanced civilization. Can be visited by [[AdventurerArchaeologist intrepid explorers]] and researchers to produce LostTechnology. There is a disturbing trend for BDO's to be [[AbandonedLaboratory abandoned]], acting as [[SealedEvilInACan prisons]] for [[TheVirus alien viruses]], which are accidentally released by said explorers.

* ''[[CapitalCity Capital]]'': Political center of an interstellar government and a place of intrigue. Represents the height of culture and power, as well as [[DeadlyDecadentCourt decadence and corruption]]. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Factory'': Center of mass production. Presented as [[NightmarishFactory industrial nightmares]], with [[PollutedWasteland polluted skies]] and [[IndustrialGhetto crowded cities]]. Its products can include technology, but often less state-of-the-art. Such worlds are focused on [[TheEngineer production/engineering]] than research.

* ''Farms'': Focuses on growing crops and raising animals. There are typically two types:

##Worlds which harvest an [[AppliedPhlebotinum important crop that has unique attributes]]. Such flora or fauna could be used for medicinal uses, especially if it's a drug. Then it would be more profitable than a world that exports beef. Such farms tend to be jungle or death worlds.

* ''Gates'': Point or area where a [[OurWormholesAreDifferent wormhole]]/ [[CoolGate stargate]]/ [[NoWarpingZone minimum hyperlimit]] that allows [[FasterThanLightTravel FTL transport]]. Vital for rapid transport (unless you want to slog decades across space), and in the cases of a PortalNetwork, act as a chokepoint.

* ''Library'': Structure that houses a huge database of the knowledge of an entire civilization. Many researchers visit here to learn from the accumulated knowledge. Often left behind by Precursors, though such projects are undertaken by more recent societies as a prestigious project. Expect it to be [[TheLibraryOfBabel very quiet and vast]].

* ''{{Penal|Colony}}'': Dumping grounds for criminals or "discontents". Expect these worlds to be unpleasant at the very least. Penal colonies can range from orderly communities to work camps to MadMax wastelands. If these worlds export anything, it's likely products of slave labor.

* ''Phlebotinum Monopoly'': When there's only one source of Immortality Drugs, Dilithium Crystals or Spice, and everybody needs it. Whoever controls this world can control the galaxy. Anticipate this world to warrant fleets or warships and armies to protect it, and [[NoBloodForPhlebotinum many fights over it]].

* ''Science'': Known for its [[ForScience research and development]], and its state-of-the-art technology. Expect these worlds to [[TheSpock value logic]] and headed by technocrats. Home to a lot of [[RuleOfCool cool gadgets]], [[FuturisticTechIndex new technology]], and [[GadgeteerGenius various scientists]] ([[MadScientist mad]] or [[ScienceHero otherwise]]).

* ''Shipyards'': Places devoted to building spacecraft. Since ships are vital to an interstellar empire, the yards are vital industries and military assets. Often military/government operated.

* ''Superweapon'': A planet or station where a [[WeaponOfMassDestruction Weapon of Really Mass Destruction]] is housed. Whoever controls the superweapon can decide the fate of the galaxy. In SpaceOpera, this is the site of a [[FinalBattle climactic battle]].

[[folder:Modifiers]]

* ''Blockaded'': Planet that is prohibited from trade, often with an enemy fleet enforcing the embargo. Smugglers and rebels would try to get pass the blockade for various reasons.

* ''Commerce'': A trade hub, either acting as a key location on HyperspaceLanes or housing the headquarters of one or more major corporations. Mercenaries and private security forces will maintain order.

* ''Cultural Center'': Major center of arts and learning, valued for its impact on society. Often focusing on the arts and entertainment.

* ''Historical Center'': Location of past importance, such as a battle. Often archaeological sites or monuments are located here. Because of its Historical status, these places are seen as important symbols. For example: a dead moon may have little or no value, but military commanders may make choose to fight there since it was the site of a previous victory.

* ''[[HolyCity Holy Center]]'': Place of major importance to a religion, often attracting pilgrims or a place of worship. If the religion is benign, attacking this center is a sign that you're an evil jackass. More fanatical sects would protect these centers.

* ''StargateSG1'': Most worlds are valued as Mines for rare materials, although Libraries, Big Dumb Objects, Farm worlds, Forbidden worlds, and Superweapons make appearances.

* Parodied in ''The Didactics of Mystique'', a takeoff on [[ChildeCycle ''The Tactics of Mistake'']]. Interstellar civilization is falling apart because each world offers only one profession, and there are far less inhabited worlds than needed professions.

* ''BattlestarGalactica'': The 2003 version had the Twelve Colonies of Kobol set up as such. Aerilon was the "bread basket" of the colonies. Caprica was the Capital and Cultural Center. Gemenon is a Holy Center. Libran is known for its lawyers. Picon has Strategic value (the Fleet HQ was located here), and a Cultural Center since it was used as a [[StargateCity substitute for Caprica in entertainment]]. Scorpia had Shipyards, and Tauron was another Farm center.

* ''Commerce'': A trade hub, either acting as a key location on a HyperspaceRoute or housing the headquarters of one or more major corporations. Mercenaries and private security forces will maintain order.

* ''{{Dune}}'': the titular planet is a Phlebotinum Monopoly, with Giedi Prime a Factory world, Ix and Richese a Science worlds, Telixau as a Underworld, Caladan is a Farm world, Kaitain is the Captial, Salusa Secundus is ostensibly a Penal colony but really a Military world. Tupile is a Service world, providing protection for exiled families.

This trope isn't about a single {{Planetville}}; It focuses on the big picture on how individual worlds interact with each other. Subtrope of PlanetOfHats, though any location (an asteroid, small moon, space colony) can serve as this. Compare/Contrast SingleBiomePlanet.

* ''BigDumbObject'': Artifact of {{Precursors}}, often a massive construct such as a DysonSphere or [[RingWorldPlanet ringworld]]. Or recently made by a highly advanced civilization. Can be visited by [[AdventurerArchaeologist intrepid explorers]] and researchers to produce LostTechnology. There is a disturbing trend for BDO's to be [[AbandonedLaboratory abandoned]], acting as [[SealedEvilInACan prisons]] for [[TheVirus alien viruses]], which are accidentally released by said explorers.

* ''[[CapitalCity Capital]]'': Political center of an interstellar government and a place of intrigue. Represents the height of culture and power, as well as [[DeadlyDecadentCourt decadence and corruption]]. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Factory'': Center of mass production. Presented as [[NightmarishFactory industrial nightmares]], with [[PollutedWasteland polluted skies]] and [[IndustrialGhetto crowded cities]]. Its products can include technology, but often less state-of-the-art. Such worlds are focused on [[TheEngineer production/engineering]] than research.

##Worlds that only produce foodstuffs to feed places that can't produce enough subsistence, such as urbanized worlds or space stations. Not much value, except if the [[CripplingOverspecialization importer is totally dependent on them]]. Then the planet becomes an AchillesHeel. Often rural in nature, but hydroponic bays and protein vats are not unheard of.

* ''Exotic'': Offers [[MinovskyPhysics scientific curiosities]] and unusual matter (monopoles, antimatter, mini black holes), or a site of strange astronomical happenings (such as wormholes or black holes). If extra-terrestrial life is rare, then worlds with alien biospheres would be of interest. Scientists and corporations would love samples of strange matter, or get a chance to observe such [[NegativeSpaceWedgie strange phenomenon]].

* ''Military'': Main export is military forces (often as [[PrivateMilitaryContractors Mercenaries]]), coming in two varieties:

** Along with these, various settings have their armies are specializing on an armed branch: armour warfare, Special Ops, sapping, urban warfare, etc. Life on these worlds tend to be tough.

* ''Mines'': Areas that harvest important natural resources. Often its rare metals, or minerals and gases needed for maintaining various ships and machines. How important and powerful a Mine is depends on how vital the resources its gathering. A world mining Tin isn't going to be much value. However, a world collecting Helium-3 (which can be used for fusion reactors) are going to be richer and better protected. Such places can range from terrestrial planets to asteroids to gas giants.

* ''[[TheFinalFrontier New World]]'': Planet that is newly discovered and open for grabs. Expect new settlers or folks fighting over the planet. Such worlds would have little to export and much to import, due to a lack of infrastructure. If settled, frontier towns are likely.

* ''{{Penal|Colony}}'': Dumping grounds for criminals or "discontents". Expect these worlds to be unpleasant at the very least. Penal colonies can range from orderly communities to work camps to MadMax wastelands. If these worlds export anything, it's likely products of slave labor.

* ''Phlebotinum Monopoly'': When there's only one source of Immortality Drugs, Dilithium Crystals or Spice, and everybody needs it. Whoever controls this world can control the galaxy. Anticipate this world to warrant fleets or warships and armies to protect it, and [[NoBloodForPhlebotinum many fights over it]].

* ''{{Pleasure|Planet}}'': Places for tourists to visit and relax, often paradise worlds or something akin to Las Vegas in space. Mostly, it is [[VacationEpisode a place for the protagonists to relax]], especially if there's [[BeachEpisode beaches]]. Not likely to be a major target, unless it's a strategic location or [[FriendlyTarget attacked for symbolic reasons]].

* ''Science'': Known for its [[ForScience research and development]], and its state-of-the-art technology. Expect these worlds to [[TheSpock value logic]] and headed by technocrats. Home to a lot of [[RuleOfCool cool gadgets]], [[FuturisticTechIndex new technology]], and [[GadgeteerGenius various scientists]] ([[MadScientist mad]] or [[ScienceHero otherwise]]).

* ''Service'': Instead of producing goods, these worlds focus on training and providing professional help. Common in [=SF=] are:

##Education: Known for their universities and training centers.

* ''Shipyards'': Places devoted to building spacecraft. Since ships are vital to an interstellar empire, the yards are vital industries and military assets. Often military/government operated.

* ''Superweapon'': A planet or station where a [[WeaponOfMassDestruction Weapon of Really Mass Destruction]] is housed. Whoever controls the superweapon can decide the fate of the galaxy. In SpaceOpera, this is the site of a [[FinalBattle climactic battle]].

[[folder: Modifiers]]

* ''Alien'': Worlds or stations inhabited by Intelligent Extra-terrestrials. An important term for emerging space societies or [[InvisibleAliens where life is rare]].

* ''Cultural Center'': Major center of arts and learning, valued for its impact on society. Often focusing on the arts and entertainment.

* ''Developing'': Planet whose technology or infrastructure is lagging. Part of the Interstellar culture and trade, but often less advanced than the major powers. Except these planets to be impoverished, often new colonies or exploited conquests. Between the major powers, [[SpaceColdWar the Developing worlds would be caught between political struggles]].

* ''Habitable'': Planet can support human life, or whatever species the protagonists are. Can range from Edens to barely habitable death worlds. In a setting were most planets are dead or uninhabitable (say RealLife), a planet with a breathable atmosphere is better than nothing.

* ''Homeworld'': Planet was a species originated from. A lot of historical and religious importance, because of its mystique of being where a species is born. The dominant species of an Empire will have their homeworld as a Primary Capital, although there are exceptions. The destruction of a Homeworld is often a major mistake for space tyrants: it not only crosses the line, but [[GenocideBackfire ensures that a native of that world would eventually destroy said tyrant]].

* ''Historical Center'': Location of past importance, such as a battle. Often archaeological sites or monuments are located here. Because of its Historical status, these places are seen as important symbols. For example: a dead moon may have little or no value, but military commanders may make choose to fight there since it was the site of a previous victory.

* ''Primitive'': Planet with little or no high technology or advancements. Any inhabitants are either aliens developing civilization or the remnants of a failed colony. Expect wilderness and perhaps alien ruins. Any interest to these worlds are either for Science or Strategic.

* ''Strategic'': A system whose location is makes it a vital military target. Expect military fleets and fortresses here.

* ''CrestOfTheStars'' / ''BannerOfTheStars'': Interstellar travel relies heavily on Gates. During Jinto's and Lafiel's adventures, they visit a Factory asteroid (producing Antimatter), a Strategic planet, help enforce a planetary Blockade, and latter coming across a rather civilized Penal world.
* ''MobileSuitGundamSEED'': ZAFT's colonies were arranged in this manner, with one group focusing on Farming, another on Information Science, another on Chemistry, and so on.

[[folder: Film]]
*''Film/{{Avatar}}'': An example of interstellar commerce with STL craft. Pandora is mostly valued for its Phlebotinum Monopoly, though having a Exotic Alien society and ecosystem.
* ''StarWars'': As with any good space opera, Star Wars provides plenty of examples. Coruscant is a Capital, Bespin and Kessel are Mines, Endor houses a Superweapon, the First Death Star itself was a Superweapon, Genosis is a Factory world, Tatooine is a minor Underworld, and Yavin and Hoth were strategic locations. Naboo was Blockaded for a while.

[[folder: Literature ]]
* ''ChildeCycle'': The interstellar economy depends on specialized services, almost to the point of CripplingOverspecialization. Dorsai and the Friendlies provide Military, Ste. Marie focuses on Farming, the Exotics on Health Services, Coby on Mining, Newton and Venus on Science, Ceta on Commercial Services, Cassdia on providing Technical Services as well as mercs. Zombri, otherwise an uninhabited world, is a Strategic location.
* ''CoDominium'': Alderson Points serve as Gates. During the [=CoDO=] era, most worlds were used as Mines, Drug Farms, and Penal Colonies. Many industrialized worlds hired out Military forces as mercs. Latter, more examples, such as Pleasure and Alien worlds begin to appear.
* ''ConSentiency'': With the development of Jumpdoors (acting as Gates), traveling between the stars is so causal there a planet devoted to a single service: Beautician worlds, Honeymoon Worlds, even Gynecologist Worlds. Dosadi is part Penal and part Science World, where every inhabitant is part of a massive experiment.
* ''CordwainerSmith'': In his Instrumentality milieu, Norstrilia is a Farm World with a Phlebotinum Monopoly, making it extremely rich and envied. Viola Siderea is an Underworld, a planet of thieves. Shayol serves as a Penal world of the BodyHorror kind.
* Parodied in ''The Didactics of Mystique'', a takeoff on [[ChildeCycle ''The Tactics of Mistake'']]. Interstellar civilization is falling apart because each world offers only one profession, and there are far less inhabited worlds than needed professions.
* ''{{Dune}}'': the titular planet is a Phlebotinum Monopoly, with Giedi Prime a Factory world, Ix and Richese a Science worlds, Telixau as a Underworld, Caladan is a Farm world, Kaitain is the Captial, Salusa Secundus is ostensibly a Penal colony but really a Military world. Tupile is a Service world, providing protection for exiled families.
* ''{{Foundation}}'': Trantor is the Capital, the Foundation serves as Science/Library as well as another Capital. Many other planets are Developing/Strategic due to their location and influence, as well as Mines. Pleasure and Farm worlds are also mentioned.
* ''GauntsGhosts'': The forest planet Tanith was, when it still existed, a major exporter of high-quality wood.
* ''HammersSlammers'': Several Farms and Mining Worlds were apparently set up this way so new colonies couldn't become economically independent. Occasionally, the protagonists end up fighting in Big Dumb Objects or against Aliens.
* ''HitchhikersGuideToTheGalaxy'', to the point that some planets now have commodities growing naturally on them such as a swamp planet with mattresses that get slaughtered and dried to be slept on. Another planet has tools that grow on trees.
* ''TheHungerGames'': Districts in the series function like this. Each has one and only one job to do (such as District 12: coal mining, or District 11: agriculture), all of which support the Capitol.
* ''APlanetCalledTreason'': Variant of this trope on a planetary level, where each Region on the planet are Service providers, specializing in different areas: Biology, Theology, Genetic Engineering, and Acting, to name a few.
* In ''Literature/HonorHarrington'', The Manticore System serves as a Gate, housing the Manticore Wormhole Junction which provides Manticore with a lot of economic clout.

* ''Literature/{{Retief}}'' has the CDT sent on various Alien/Developing worlds, often trying negotiate with the natives. Such worlds are often caught between the cold war of the CDT and the Groaci, who vie for political influence.

* ''BabylonFive'' is a Service station, providing a interstellar forum, among other things. The various homeworlds tend to serve as Capitals of the major powers. There is a brief mention of a Disneyplanet. Z'ha'dum is considered forbidden.

** Following the Fall of the Colonies, the Rag-Tag Fleet's economy is set up like this. Justified, in that only certain surviving ships were only equipped for certain functions.
* ''Series/DoctorWho'' has featured many such examples. "Silence in the Library" takes place on a library planet. Satellite 5 is a Service station providing news [[spoiler: and a Capital for the true rulers of the Human Empire]]. Billions of Years in the Future, Earth is a Cultural and Historical Center.
* ''StargateSG1'': Most worlds are valued as Mines for rare materials, although Libraries, Big Dumb Objects, Farm worlds, Forbidden worlds, and Superweapons make appearances.
* ''Franchise/StarTrek'': Earth serves as the Capital, though oddly enough unprotected in many movies. It, along with Mars, also has Shipyards. Risa is a Pleasure Planet, Rura Pente as a penal world, and various {{Unobtainium}} mines, Big Dumb Objects, Forbidden locations, and Exotic places.

[[folder: TabletopGames]]

* ''{{Warhammer 40000}}'': Many worlds are known for what it produces to the Imperium's war machine: Forge worlds producing high technology, Feral or Death worlds providing Military forces, Holy Terra as a Holy Capital, and Cadia as a strategic world.

* In the ''{{Myst}}''/''Uru'' franchise, the Age of Teledahn was farmed for a type of fungal spore used in D'ni cuisine.

* Partial example in the ''EscapeVelocity'' series, where bulk commodities can be purchased at most worlds. Usually, among the generics (food, metals, equipment, luxuries, medical supplies) one or two will be cheaply available and one or two will be more expensive. However, in ''Nova'', many worlds have a "special" commodity that is generally only traded at two or three worlds (some supplying it, others demanding it), which are either quite valuable or just interesting flavor.

Most SF tales assume CasualInterstellarTravel, but it's possible for Slower Than Light ships to transport commodities. But the items being traded would be of extreme value to justify the high cost and long wait.

* In the {{Vorkosigan Saga}} Komarr serves as both Gate and Strategic for Barrayar since it contains the wormhole route that is the ''only'' connection that Barrayar has to the rest of the galaxy. The Hegen Hub is a more general Gate. Beta Colony is Science (of almost all varieties), Jackson's Whole is Underworld Service and Earth is Cultural Capital.

* ''StarTrek'': Earth serves as the Capital, though oddly enough unprotected in many movies. It, along with Mars, also has Shipyards. Risa is a Pleasure Planet, Rura Pente as a penal world, and various {{Unobtainium}} mines, Big Dumb Objects, Forbidden locations, and Exotic places.
** ''StarTrekTheNextGeneration'' shows us the trope in action. In the episode ''Symbiosis'', One of the two planets of the week produces nothing but a narcotic which the other planet believes is a cure to a virulent plague (whose symptoms just happen to look exactly like withdrawal).

* ''Exotic'': Offers scientific curiosities and unusual matter (monopoles, antimatter, mini black holes), or a site of strange astronomical happenings (such as wormholes or black holes). If extra-terrestrial life is rare, then worlds with alien biospheres would be of interest. Scientists and corporations would love samples of strange matter, or get a chance to observe such [[NegativeSpaceWedgie strange phenomenon]].

* ''Phlebotinum Monopoly'': When there's only one source of Immortality Drugs, Dilithium Crystals or Spice, and everybody needs it. Whoever controls this world can control the galaxy. Anticipate this world to warrant fleets or warships and armies to protect it.

* ''Superweapon'': A planet or station where a Weapon of Really Mass Destruction is housed. Whoever controls the superweapon can decide the fate of the galaxy. In SpaceOpera, this is the site of a [[FinalBattle climactic battle]].

* ''BigDumbObject'': Artifact of precursors, often a massive construct such as a DysonSphere or Ringworld. Or recently made by a highly advanced civilization. Can be visited by [[AdventurerArchaeologist intrepid explorers]] and researchers to produce LostTechnology. More recently, the BDO's act as [[AbandonedLaboratory prisons]] for [[TheVirus alien viruses]], which are accidentally released by said explorers.

* ''[[CapitalCity Capital]]'': Political center of an interstellar government and a place of intrigue. Represents the height of culture and power, as well as decadence and corruption. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Farms'': Focuses on growing corps and raises animals. There are typically two types:
##Worlds that only produce foodstuffs to feed places that can't produce enough subsistence, such as urbanized worlds or space stations. Not much value, except if the importer is totally dependent on them. Then the planet becomes an AchillesHeel. Often rural in nature, but hydroponic bays and protein vats are not unheard of.
##Worlds which harvest an important crop that has unique attributes. Such flora or fauna could be used for medicinal uses, especially if it's a drug. Then it would be more profitable than a world that exports beef. Such farms tend to be jungle or death worlds.

* ''Forbidden'': Location of dangerous nature that no one visits. Could be a colony ravaged by plague or infested by alien locusts. Whatever the reason, the planet is no longer of any value, covered in ruins or wasteland. Only adventurers would willingly travel to these worlds.

* ''Gates'': Point or area where a wormhole/ stargate/ minimum hyperlimit that allows FTL transport. Vital for rapid transport (unless you want to slog decades across space), and in the cases of a PortalNetwork, act as a chokepoint.

## Supersoldiers, often living in a military culture and/or harsh environment to develop their skills.
## Cannon Fodder, hired out only because the planet has nothing else to sell.

* ''{{Pleasure|Planet}}'': Places for tourists to visit and relax, often paradise worlds or something akin to Las Vegas in space. Mostly, it is a place for the protagonists to relax. Not likely to be a major target, unless it's a strategic location or attacked for symbolic reasons.

* ''Science'': Known for its [[ForScience research and development]], and its state-of-the-art technology. Expect these worlds to value logic and headed by technocrats. Home to a lot of [[RuleOfCool cool gadgets]], new technology, and [[GadgeteerGenius various scientists]] ([[MadScientist mad]] or [[ScienceHero otherwise]]).

* ''Superweapon'': A planet or station where a Weapon of Really Mass Destruction is housed. Whoever controls the superweapon can decide the fate of the galaxy. In Space Opera, this is the site of a climactic battle.

* ''Alien'': Worlds or stations inhabited by Intelligent Extra-terrestrials. An important term in space societies just emerging or InvisibleAliens where life is rare.

* ''Homeworld'': Planet was a species originated from. A lot of historical and religious importance, because of its mystique of being where a species is born. The dominant species of an Empire will have their homeworld as a Primary Capital, although there are exceptions. The destruction of a Homeworld is often a major mistake for space tyrants: it not only crosses the line, but ensures that a native of that world would eventually destroy said tyrant.

* ''Science'': Known for its [[ForScience research and development]], and its state-of-the-art technology. Expect these worlds to value logic and headed by technocrats. Home to a lot of [[RuleOfCool cool gadgets]], new technology, and [[GadgeteerGeniuses various scientists]] ([[MadScientist mad]] or [[ScienceHero otherwise]]).

* ''BigDumbObject'': Artifact of precursors, often a massive construct such as a DysonSphere or Ringworld. Or recent construct by a highly advanced civilization. Can be visited by intrepid explorers and researchers to produce LostTechnology. More recently, the BDO's act as prisons for alien viruses, which are accidentally released by said explorers.

* ''Capital'': Political center of an interstellar government and a place of intrigue. Represents the height of culture and power, as well as decadence and corruption. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Factory'': Center of mass production. Presented as industrial nightmares, with polluted skies and crowded cities. Its products can include technology, but often less state-of-the-art. Such worlds are focused on production/engineering than research.

##Worlds that only produce foodstuffs to feed places that can't produce enough subsistence, such as urbanized worlds or space stations. Not much value, except if the importer is totally dependent on them. Then the planet becomes an Achilles' heel. Often rural in nature, but hydroponic bays and protein vats are not unheard of.

* ''New World'': Planet that is newly discovered and open for grabs. Expect new settlers or folks fighting over the planet. Such worlds would have little to export and much to import, due to a lack of infrastructure. If settled, frontier towns are likely.

* ''Penal'': Dumping grounds for criminals or "discontents". Expect these worlds to be unpleasant at the very least. Penal colonies can range from orderly communities to work camps to MadMax wastelands. If these worlds export anything, it's likely products of slave labor.

* ''Science'': Known for its research and development, and its state-of-the-art technology. Expect these worlds to value logic and headed by technocrats. Home to a lot of cool gadgets, new technology, and various scientists (mad or otherwise).

##Financial: People who work with money, including loaning, banking, trading, escrow agencies, etc.

* ''Underworlds'': Planet notable for its black market products and services. With enough money, one can hire thieves, smugglers, and assassins. Otherwise, one can purchase slaves, illegal technology, and other contraband. The items provided by an Underworld need not be illegal, but merely taboo. Such locations are commonly seedy and ruled by those in the shadows.

* ''Alien'': Worlds or stations inhabited by Intelligent Extra-terrestrials. An important term in space societies just emerging or where intelligent life is rare.

* ''Developing'': Planet whose technology or infrastructure is lagging. Part of the Interstellar culture and trade, but often less advanced than the major powers. Except these planets to be impoverished, often new colonies or exploited conquests. Between the major powers, the Developing worlds would be caught between politcal struggles.

* ''Dying'': Planet that has seen better days, and is now waning. They may have been over exploited and depleted of primary resources or undergoing a natural calamity. These planets tend to collect garbage, both physical artifacts and the seedier elements of society.

* ''Holy Center'': Place of major importance to a religion, often attracting pilgrims or a place of worship. If the religion is benign, attacking this center is a sign that you're an evil jackass. More fanatical sects would protect these centers.

** also about the moons, as you can only have only one POS (Player Owned Station) in their orbit: some are deathstars loaded with weapons, others have factories or science facilites, and others are just there to mine the moon if it holds valuable resources.
* Mostly averted in the ''{{X}}-Universe'' games, but some sectors specialize in only a few types of goods. Asteroid Belt in ''Terran Conflict'' mostly produces different types of minerals from the asteroid mines, for example.

* There are frequent visits to "Commerce Planets" in ''Series/{{Farscape}}''.

* ''BigDumbObject'': Artifact of precursors, often a massive construct such as a DysonSphere or Ringworld. Or recent construct by a highly advanced civilization. Can be visited by intrepid explorers. More recently, the BDO's act as prisons for alien viruses, which are accidentally released by said explorers.

* ''Superweapon'': A planet or station where a Weapon of Really Mass Destruction is housed. Whoever controls the superweapon can decide the fate of the galaxy. In Space Opera, this is the site of a climatic battle.

* ''Series/DoctorWho'' has featured many such examples. "Silence in the Library" takes place on a library planet. Satellite 5 is a Service station providing news [[spoiler: and a Capital for the true rulers of the Human Empire]]. Billions of Years in the Future, Earth is a Cultral and Historical Center.

Often in the StandardSciFiSetting, trade is common between star systems. Sometimes to survive, a planet becomes so specialized that focuses on a certain commodity. Maybe its building weapons or providing doctors. Whatever it is, the world trades this resource with other planets, becoming renowned for the export.

* ''BigDumbObject'': Artifact of precursors, often a massive construct such as a DysonSphere or Ringworld. Or recent construct by a highly advanced civilization. Often visited by intrepid explorers. More recently, the BDO's act as prisons for alien viruses, which are accidentally released by said explorers.

* ''Capital'': Political center of an interstellar government and a place of intrigue. Often represents the height of culture and power, as well as decadence and corruption. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Factory'': Center of mass production. Often presented as industrial nightmares, with polluted skies and crowded cities. Its products can include technology, but often less state-of-the-art. Such worlds are focused on production/engineering than research.

* ''Exotic'': Offers scientific curiosities and unusual matter (monopoles, antimatter, mini black holes), or a site of strange astronomical happenings (such as wormholes or black holes). If extra-terrestrial life is rare, then worlds with alien biospheres would be of interest. Scientists and corporations would love samples, or get a chance to observe such [[NegativeSpaceWedgie strange phenomenon]].

* ''Holy Center'': Place of major importance a religion, often attracting religious pilgrims or a place of worship. If the religion is benign, attacking this center is a sign that you're an evil jackass, since it is often undefended. More fanatical sects would protect these centers.

Often in the StandardSciFiSetting, trade is common between star systems. Sometimes to survive, a planet has to become so specialized that it can only produce a certain commodity. Maybe its building weapons or providing doctors. They then trade these resources with other planets.

This trope isn't about a single {{Planetville}}; It focuses on the big picture on how invdiual worlds interact with each other. Subtrope of PlanetOfHats, though any location (an asteroid, small moon, space colony) can serve as this. Compare/Contrast SingleBiomePlanet.

* ''Big Dumb Object'': Artifact of precursors, often a massive construct such as a DysonSphere or Ringworld. Or recent construct by a highly advanced civilization. Often visited by intrepid explorers. More recently, the BDO's act as prisons for alien viruses, which are accidentally released by said explorers.

* ''Capital'': Political center of an Interstellar government, major center of administration and a place of intrigue. Often represents the height of culture and power, as well as decadence and corruption. Highly valued, expect the world to be well protected...unless no ships are available for whatever reason. Capitals of various space Empires tend to be [[CityPlanet highly urbanized]].

* ''Exotic'': Exports scientific curiosities and exotic matter (monopoles, antimatter, mini black holes) or strange astronomical happenings (such as wormholes or black holes). If extra-terrestrial life is rare, then worlds with alien biospheres would be of interest. Scientists and corporations would love to have these, or get a chance to observe such [[NegativeSpaceWedgie strange phenomenon]].

* ''New World'': Planet that is newly discovered and open for grabs. Except attracting new settlers (or folks to fight over the planet). Such worlds would have little to export and much to import, due to a lack of infrastructure. If settled, frontier towns are likely.

* ''Penal'': Dumping grounds for criminals or "discontents". Expect these worlds to be unpleasant at the very least. Penal colonies can range from orderly communities to work camps to MadMax wastelands. If these worlds export anything, it's likely products of slave labor or potential supersoldiers.

* ''CordwainerSmith'': In his Instrumentality milieu, Norstrilia is a Farm World with a Phlebotinum Monopoly, making it extremely rich and envied. Viola Siderea is an Underworld, a planet of thieves. Shayol serves as a Penal world of the BodyHorror kind.