Planet Name Generator
Verified by Gianni V.S.
Generate sci-fi planet names for worldbuilding, novels, and games from style-specific word banks. Pick a style and generate as many as you like.
About this generator
The Planet Name Generator builds sci-fi planet names by pairing a style-specific adjective with a style-specific noun, entirely in your browser, so the same click rarely produces the same name twice. Every word comes from a hand-written bank tied to one of four styles, and the generator swaps between four sentence patterns, including a noun-only option and a reversed 'Noun of the Adjective' phrase, so results do not all read the same shape. Pick a style below, or leave it on 'Any' to draw from every style's word bank at once for the widest possible variety.
How the Planet Name Generator works
Each name is assembled from a template such as 'Adjective Noun' or 'Noun of the Adjective', with the adjective and noun each pulled independently from the selected style's word bank. The Length control decides which templates are in play: 1 word returns just the noun on its own, 2 words covers the 'Adjective Noun' pairing, and 3+ words alternates between 'The Adjective Noun' and 'Noun of the Adjective' so a longer result does not always open with the same word. Style changes both word lists at once and is the setting that does the most work here: Scientific leans toward the catalog-like, terrain-and-atmosphere vocabulary a real space agency or hard sci-fi novel would use, with words like 'Basaltic' and 'Perihelion'. Alien draws on entirely invented syllable combinations built to sound sayable but unlike any real language, with words like 'Xiraeth' and 'Kethrune'. Mythic borrows the register of a name given to honor a god, with invented god-sounding words like 'Corvanthes' and 'Vyktaris' rather than any real deity's actual name. Space Opera leans into frontier, rebellion, and empire vocabulary in a generic dramatic register, with words like 'Insurgent' and 'Stronghold', deliberately built from common genre vocabulary rather than any single franchise's trademarked terms. Real planet naming in our own solar system followed a single unbroken convention for thousands of years: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune are all named for Roman or Greco-Roman deities, a tradition started by naked-eye observers in antiquity and deliberately preserved when Uranus and Neptune were discovered with telescopes in the 18th and 19th centuries. Earth is the one exception, since its name comes from Old English and Germanic roots rather than a god's name at all.
How many different names this generator can make
Each style pairs 25 adjectives with 25 nouns across four templates, including the single noun-only option, producing 1,900 distinct combinations per style and 7,600 across all four styles combined. Setting style to 'Any' merges every style's word bank before generating, which lets a mythic adjective land on a space opera noun or an alien noun follow a scientific adjective, and because 'Sovereign' appears in both the Mythic and Space Opera adjective banks, that single overlap gets merged into 99 unique adjectives against 100 unique nouns rather than counted twice, yielding 29,800 valid combinations for 'Any', a large jump from any single style but short of what a simple sum of the four styles' totals would suggest. Within a single browser session the generator also tracks every name it has already shown you and skips it, so repeats stay rare unless you exhaust a single style's pool by generating heavily.
Tips for naming a planet
- Match the style to the story: a Scientific name suits a planet a survey ship just catalogued, while a Mythic or Alien name suits one with a long native history of its own.
- Use Space Opera names for planets caught up in a larger conflict, since the vocabulary already leans toward frontier outposts, contested territory, and fallen strongholds.
- Keep a consistent style for every planet in one star system or empire so the names read as one setting, then switch styles entirely for a rival faction or an unexplored region to make the galaxy feel larger.
- Say an Alien-style name out loud before committing to it. A word that looks striking on the page but trips up the tongue is worth regenerating, even in a style built to sound unfamiliar.
Frequently asked questions
Are these planet names unique to me?
Not in the sense of being reserved to you. Two different visitors can land on the exact same adjective and noun pairing, since the generator has no record of what anyone else has generated. Within a single browser session, though, the tool tracks every name you have already been shown and skips it, so you will not see the same result twice in a row while you keep clicking. If you are naming a planet for a published setting or an ongoing campaign, you will still need to check for existing use yourself, since that check is separate from what this tool tracks.
Can I use a generated planet name in my own game or writing?
Yes, generated names are free to use in your novel, tabletop campaign, video game, or any other project with no attribution required. The generator does not check whether a name already appears in a published book or another creator's setting, so a quick search is worthwhile before you build a whole star system around a name. Because the word banks combine common sci-fi vocabulary and invented syllable combinations, occasional overlap with an existing planet name from another setting is possible and is on you to catch, not something the tool verifies.
Why do names from different styles sound so different?
Each style pairs its own hand-written adjective and noun word bank, so the vocabulary itself changes completely from one style to the next rather than just the sentence pattern around it. Scientific and Mythic word banks lean toward real-astronomy terminology or a god-naming register, while Alien word banks are built from invented syllable combinations meant to sound unlike any real language, and Space Opera draws on frontier and conflict vocabulary instead. This is a deliberate design choice: a style is meant to shift the entire feel of a planet name in one click, the same way real astronomers and novelists both use naming conventions to signal what kind of world they mean. If you generate several names within the same style, expect a consistent register throughout, since every word still comes from that one style's bank.
Where would I actually use a generated planet name?
A generated planet name is meant for a manuscript, a tabletop campaign's star map, or a set of worldbuilding notes, not an account system or platform with its own naming rules. Because it names a fictional world rather than a registered identity, there is no uniqueness requirement or character limit to satisfy beyond whatever fits your own setting. Science fiction authors and game masters commonly generate several options while sketching a star system and keep whichever fits the tone of that world best. If two planets in the same setting end up sounding too similar, generating again within the same style usually produces a clearly different result rather than a near-duplicate.
Do real planets actually get named after gods, and does that still happen today?
Yes, but only for the eight planets in our own solar system, and the tradition is a very old one. Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune are all named for Roman or Greco-Roman deities, a convention that started with naked-eye observation in antiquity and was deliberately kept going when Uranus and Neptune were found with telescopes centuries later; Earth alone breaks the pattern, since its name comes from Old English rather than a god's name. Planets discovered orbiting other stars work completely differently: the formal scientific designation the International Astronomical Union recognizes is just the host star's catalog name plus a lowercase letter, such as 51 Pegasi b for the first exoplanet found around a sun-like star, and there is no unified convention requiring a mythological name at all. A small number of exoplanets have since been given an official nickname-style proper name through an IAU public naming contest, but that is the exception rather than the rule, which is exactly why the Mythic style here invents its own god-sounding names instead of reusing real ones.