History Main / PlanetSpaceship

* The Starship Mario serves as the HubLevel in ''VideoGame/SuperMarioGalaxy2'' and flies Mario between galaxies. Though it's a BabyPlanet like most of the others in the game.

** Perhaps even more impressive, the Culture incorporates ''hundreds of thousands'' of GSVs by the later Culture novfels.

* In ''Literature/TheCityAndTheStars'' by Creator/ArthurCClarke, it is revealed at the end that [[spoiler:most of the humanity left the Galaxy to explore the universe... in a star cluster made into a fleet.]]

* The planet Mongo is mobile and controlled by Emperor Ming in the ''Film/FlashGordonSerial''. It's near collision with Earth was no accident.

* The alien mothership in ''Film/IndependenceDay'' was estimated to be several hundred kilometers in diameter. ''Film/IndependenceDayResurgence'' tops it with a larger mothership that dwarfs the Atlantic ocean and has its own ecosystem.

* In the ''Series/StarTrekTheOriginalSeries'' ep. "For the World is Hollow and I Have Touched the Sky" a group of aliens have been sequestered inside a large interstellar asteroid for so long that they have forgotten that they are actually inside one.

*** ExpandedUniverse about this timeline states that, between DYRL and this series, ''five'' Main Fleet have shown up, each with her own Main Base.

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* In ''Manga/{{Outlanders}}'', Earth's Moon is revealed to be a millennia-old ship, the superweapon called "Dola".

* ''Space Battleship Yamato 2'' and ''Farewell to Space Battleship Yamato'': The White Comet Empire's mobile space battle fortress Gatlantis (OS).
* ''Tytania'': The Empire of Valdana's and Tytania clan's Imperial Capital/Palace ship.
* The ''Crest of the Stars'' and ''Banner of the Stars'': The Abh's capital Lakfakalle interstellar mothership.
* ''Saber Rider and the Star Sheriffs'': The Vapor Beings/Outriders' Outrider encased planet ship.
* ''Detonator Orgun: The Evoluder'':The Evoluder's planet ship.
* ''Last Exile'' and ''Last Exile -Fam, The Silver Wing-'': The world of Prester itself is a world ship.
* ''Anime/TenchiMuyo'':
** The Kuramitsu family have a planet-sized spaceship called that can destroy planets and seems to be a nod to the Death Star from ''Franchise/StarWars''.
** Some [[SpaceStation Space Stations]] are larger than planets, like the Galaxy Academy being the size of a solar system.
* ''Martian Successor Nadesico: The Motion Picture – Prince of Darkness'': The base ship that was re-image in the ''Star Trek Beyond'' as Yorktown starbase.
* ''Phantasy Star Online 2: Episode Oracle'': The Oracle motherships holding the planets and beings Xion and Xiao.
* ''Heroic Age'': The Bronze tribe's asteroids and planet ships.
* ''Gunbuster'': The Buster Machine III has Jupiter as its core.
* ''Diebuster'': The Earth is turned into a spaceship ramming weapon.
* ''Franchise/{{Gundam}}'':
** ''Anime/Gundam00AWakeningOfTheTrailblazer'' shows the massive main ship of the ELS, a massive ship with the diameter of approximately 3000km made up of sentient living metal.
** The manga ''Enhanced human tale: MAD WANG 1160'' mentions planet-sized ships but also claims their large size tend to make them a big target thus are relatively rare.

** In an [[https://tardis.fandom.com/wiki/Blood_Heat_(novel) expanded universe novel]] the Doctor expands the TARDIS interior to encompass ''the whole Earth''. It works, but the power drain nearly rips the TARDIS apart.

** The Time Lords are shown to have the ability to [[/Recap/DoctorWhoS23E1TheMysteriousPlanet move entire planets lightyears through space]]. Technically they can turn ''any'' planet into a spaceship, including their own.

* ''WebOriginal/OrionsArm'': The Leviathan, a ''galaxy'' spaceship. That is to say, it's the approximate mass of an entire galaxy moving under its own power, with an approximate size of 10 light-years. It is believed to consist of a huge number of {{Dyson Sphere}}s connected in a giant net-like configuration. It's travelling through dark space from another galaxy cluster and is currently passing through the Triangulum Galaxy. How in the hell someone managed to build something like this, or more importantly, ''why'' someone built something like this, is entirely unknown. Fortunately, since FTL travel is not possible in this 'verse, it'll be around 4 million years before anyone in the Milky Way has to worry about this thing...

* In Creator/LarryNiven's ''Literature/KnownSpace'' series, the Pierson's Puppeteers are a race of cowards, and the only Puppeteers humans have met are insane-- because no sane Puppeteer would trust his life to something so fragile as a spaceship. So when they discover a massive wave of radiation approaching their home system, they leave it behind... but take their planets with them. They put them in orbit around each other (see [[http://en.wikipedia.org/wiki/Klemperer_rosette Klemperer Rosette]] on Wiki/TheOtherWiki) and accelerated them to just under lightspeed, heading out of the galaxy. Because humans have faster than light starships (which Puppeteers are too afraid to use), they expect humans to greet them at their destination, the Clouds of Magellan.

** The Kuramitsu family have a planet-sozed spaceship called that can destroy planets and seems to a nod to the Death Star from ''Franchise/StarWars''.

** In ''Film/TheForceAwakens'', Starkiller Base is the Death Star UpToEleven. It's an alpine planet that's been ''converted'' into a superweapon, making it many times larger than the Death Star. While it is never shown moving, since it ''eats stars'' to fuel its super-cannon, it was presumably intended to relocate once the system it was in ran out of stars to eat.

** Possibly the most extreme examples: Klongheim and Parsfon, the fully FTL-capable homes of rival robot civilizations traveling the universe in search of their rightful masters, with dimensions measured in [[UpToEleven light-months]]. It's strongly suggested that these got their start as remnants of some cosmic disaster or other that weren't so much built as colonized.

* ''WebOriginal/OrionsArm'': Taken UpToEleven with the Leviathan, a ''galaxy'' spaceship. That is to say, it's the approximate mass of an entire galaxy moving under its own power, with an approximate size of 10 light-years. It is believed to consist of a huge number of {{Dyson Sphere}}s connected in a giant net-like configuration. It's travelling through dark space from another galaxy cluster and is currently passing through the Triangulum Galaxy. How in the hell someone managed to build something like this, or more importantly, ''why'' someone built something like this, is entirely unknown. Fortunately, since FTL travel is not possible in this 'verse, it'll be around 4 million years before anyone in the Milky Way has to worry about this thing...

*** In DC`s New 52 ''Green Lantern: New Guardians'' series there was a whole artificial solar system, with inhabitable interiors for various species, [[spoiler: [[TheArk it was built to replace the star system Larfleeze the orange lantern inhabits]].]]

** The first to appear is Pacificus, Reginella's homeworld. It doesn't have full control over its course, but can change speed and manouver on a number of pre-decided routes.
** The second is Vampirione. It has better manouvering abilities than Pacificus but is slower, as shown when its inhabitants chase Pacificus to try and [[HordeOfAlienLocusts steal all its resources]].

*** The first relaunch story, "Might and Power", shows that the Evronians in the BadFuture did it again: they transformed another planet in a spaceship, in this case [[spoiler: Earth]]. It took them two hundred years.

* In ''Literature/TheCityAndTheStars'' by Creator/ArthurCClarke, it is revealed at the end that [[spoiler: most of the humanity left the Galaxy to explore the universe... in a star cluster made into a fleet.]]

* In ''[[Literature/{{Skyward}} Evershore]]'', it's revealed that [[spoiler: the planet of Detritus (where most of the series has been set) is capable of interstellar travel, being fitted with mechanisms to allow it to be teleported by a cytonic and with special gravity dampeners to minimize the stress on planets it teleports too close to.]]

* Creator/CordwainerSmith gives us ''The Golden Ship'' - a sphere 90 million miles in length (just 2 million miles short of an AU). That's approximately 100 times larger than Earth's sun! Extremely fast, it could move in seconds. [[spoiler: However, the Golden Ship is really a decoy, being mostly hollow and consisting of foam and wires. It has no weapons of its own, and must rely on its speed to survive.]]

** The Kurii live in "Steel Worlds" in the asteroid belt; from there they plot their plans to destroy the Priest-Kings and take over Gor & Earth for themselves. The Steel Worlds have artificial weather & daytime/nighttime and rotate to simulate gravity, with beings living on the inside circumferance of the ships. They used to have a planet of their own but they destroyed it making war with each other.

* The ''Literature/MyTeacherIsAnAlien'' series has a ship called the ''New Jersey'', so called because it's ''the size'' of New Jersey. (It's actually an alien spaceship, but christened by a fan of Earth.) Its inhabitants use {{Teleportation}} to get around rather than walk hundreds of miles from one place to another. It's mentioned off-hand that it's considered extremely ''small'' for a mothership due to the mechanics of spacefilght, and only possible because of cutting-edge new technologies.
* When the aliens of Creator/GregEgan's ''Literature/{{Orthogonal}}'' trilogy develop their [[spoiler: PerpetualMotionMachine engines that are powered by light and consume (almost) no fuel]], some characters discuss building massive engines on the [[DoomedHometown Doomed Home Planet]] and "flying" the planet to safety like a straightforward PlanetSpaceship. At/after the end of the trilogy, though, [[spoiler: they instead ''put out the sun'' and build engines ''on its surface'', so that they can move it and let its gravity take care of pulling the planet along, which will cause fewer seismic disturbances on the planet. This is at least partially justified in that, InUniverse, the sun actually ''is'' just a big ball of flammable rock that is on fire, not a ball of gas undergoing a continuous fusion reaction.]]

* In the ''Literature/XeeleeSequence'', humanity uses celestial objects in their misguided war against the [[SufficientlyAdvancedAlien lords of the baryonic universe]], the Xeelee and their Great Attractor. In ''Flux'', humanity converted a neutron star into a starship, sinking a ReactionlessDrive beneath the crust, [[BrainUploading uploading minds]] into computronium in the core, and building nigh-microscopic [[HumanSubspecies human analogues]] to tend machinery on the crust. In the finale to the ''Vacuum Diagrams'' short story collection, the Qax lead an assault on the [[spoiler: photino birds]] around the Attractor, using a red giant star as a flagship.

* In ''Series/{{Andromeda}}'', the Magog come from worlds (yes, that's plural — twenty of them) locked together in some kind of structure. The whole thing is mobile, FTL capable, and even contains an artificial sun. [[spoiler: Oh, and it can survive a hit from a Nova Bomb, the largest weapon in the Commonwealth arsenal, normally capable of nuking entire solar systems.]]

* Sometimes people call Earth a "living space-ship" considering it's fit for human habitation, though it could be considered more of a station due to the orbit.

** ''TabletopGame/{{Starfinder}}'', In addition to Apostae still being around, there is the Brethedan moon of [[spoiler: Hibb]], a SleeperShip that drifted into Bretheda's orbit during the Gap.

** The Necron World Engine, unsurprisingly, is a Necron ship the size of a planet (because they slapped an engine on a planet). An entire space marine chapter sacrificed itself to give an enormous Imperial fleet a fighting chance.

** The Attack Moons were hollow planetoid ships used by Orks during [[Literature/TheBeastArises the War of the Beast]]. They were created by directly converting the matter of actual planets into the ships, with the same process allowing Attack Moons to repair by stripping planetoids. According to the Eldar, millions of years ago when the orks were known as krorks, the achievements of the greenskins put the Beast's later achievements to shame.
** On a smaller scale, ork roks are asteroids and other large celestial bodies that have been hollowed out, filled with orks, sealed against vacuum, and fitted with ginormous engines to be sent through the Warp. Once close to a planet, they then serve as one-time drop pods.
** Space Hulks can also fit this definition, though they don't get to the size of planets. Space ships in 40K can be many kilometers long, tall, AND wide. A hulk can be made of hundreds of such ships smashed together. Destroying with convention (nuclear bomb sized) weapons is... difficult to say the least. This is why oftentimes they just drift from place to place, but sometimes the engines on the various wrecks still work well enough to allow limited control.

* The Access Ark in ''VideoGame/KirbyPlanetRobobot'' looks to be nearly as big as Popstar itself in the opening cinematic and on the world map. It's the mothership of the Haltmann Works Company and is used to mechanize and invade planets before stripping them of their resources, [[spoiler: though its true nature ends up being quite a surprise]].

** Abel's Ark is an EldritchStarship the size of an entire solar system. [[spoiler: After the Durandal is rammed into it in ''Episode III'', you can actually see what's left of it as a backdrop when you go inside the Ark.]]
* Downplayed in ''VideoGame/SpaceTyrant.'' The Hoplites (a ProudWarriorRace of [[spoiler: humanoid rabbits]]) utilize asteroids to build their ships out of, by hollowing them out and adding computers, comms, engines, and guns. Small ships use small spacerocks, big ships use bigger (or even multiple, as is the case with Cruisers and Battleships) spacerocks. Except for their Destroyers, which mostly use purpose-built hulls (constructed from yellow jade, of all things).

* The climax of ''Webcomic/AMiracleOfScience'' features [[spoiler: Mars' moon Deimos]] being used in this fashion, in this case [[spoiler: to provide a credible threat to back up the main characters and get the BigBad to stand down]]. It's also a clever use of ExactWords, as [[spoiler: Mars is under treaty to never extend military force beyond the orbit of Deimos. If Deimos can move...]]

* In ''WesternAnimation/InvaderZim'', the original inhabitants of Mars drove themselves to extinction converting their planet into a giant spaceship... "[[RuleOfCool Because it's cool]]". [[spoiler: A similar thing happened to Mercury, which leads to an awesome dogfight.]]

* In an early draft and Marvel's ComicBookAdaptation of ''WesternAnimation/TheTransformersTheMovie'', Junkeon is revealed to be one with the Autobots flying it to Cybertron rather than finding a ship.

* ''Anime/{{Doraemon}}:

* The Milky Way Drifting Fleet from ''Anime/DoraemonNobitasDriftsInTheUniverse'' is a giant, planet-sized spaceship constructed by the humans of Planet Laguna 300 years ago to escape their doomed planet. Over the centuries the Fleet gets bigger as bigger when aliens from different worlds begin taking refuge aboard, and when Doraemon and friends arrive they realize it to be the home of millions upon millions of aliens, humans and robots from all across the galaxy.

* In ''WesternAnimation/{{Home}}'', the nomadic Boov travel across the cosmos in an absolutely titanic starship in their search for a new home.

* Titan, for which ''WesternAnimation/TitanAE'' is named, is a very large, spherical spaceship. When activated, it converts energy into mass and [[spoiler:turns into an actual planet.]]

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