Planet Name Generator
Name a planet badly and readers feel it immediately: "Zorg-9" for a water world, "Aquarius Prime" for a desert wasteland. The name is often the first thing a reader encounters, and it carries more weight than most writers expect. This generator draws on real naming traditions: IAU conventions, the Greek and Latin roots behind Mercury, Venus, and the outer gas giants, the Māori and Indigenous names given to recent trans-Neptunian objects. Whether you need something pronounceable for a habitable world or something deliberately harsh and consonant-heavy for a tidally locked rock, the tool works from the physical and positional logic of the body itself: size, atmosphere, distance from its star, surface character, rather than producing random syllable strings. It handles the full range: gas giants, super-Earths, barren terrestrials, ocean worlds, rogue planets with no star at all. Feed it what you know about the world and it will return names that fit.
Astronomical Traditions
Planet names in fiction draw from a surprisingly narrow well. Our solar system's roster comes from Roman theology: Mercury, Venus, Mars, Saturn, while exoplanet catalogs lean on alphanumeric designations like Kepler-186f, which are accurate but do nothing for a reader's imagination. Science fiction has always raided classical mythology for the same reason ancient astronomers did: the names carry weight. Le Guin's Urras and Anarres feel planetary partly because they sound like they belong to a tradition, even a made-up one. Herbert's Arrakis works the same way: Arabic roots, harsh consonants, a name that sounds like the place it describes. The generator produces names that can slot into existing astronomical conventions or help you build a coherent naming logic for your world. If your civilization names planets after rivers, or saints, or defeated enemies, the output can suggest patterns rather than isolated words.
Environmental Characteristics
Planet names in fiction tend to do real work. Arrakis tells you something before you read a word of description. Solaris unsettles you with its smoothness. The best names carry the planet's dominant quality: temperature, atmosphere, geology, color, without spelling it out. This generator produces names along those lines: words that suggest cold, heat, rust-red oxidized surfaces, or dense ammonia skies, and make a reader feel the gravity of a place before any character sets foot there. Whether you're naming a colony world, a dead rock on a star chart, or the obsessive center of your novel, the output gives you a sound and suggestion you can keep, modify, or use as a starting point for something stranger.
Cultural Meaning
Planet names in fiction tend to carry the fingerprints of whoever did the naming: conquerors, colonists, cartographers working from someone else's map. Iain M. Banks named his Culture ships with deliberate irony; Ursula K. Le Guin gave her worlds names that felt worn-in, as though people had been arguing about them for centuries. The name a society gives a planet says something about what that society values, fears, or wants to claim. Homeworld names especially accumulate meaning over time. "Earth" is just the old word for soil. "Arrakis" sounds like a place that would kill you. That weight is hard to manufacture, but it starts with sound and suggestion. This generator produces names with enough connotative texture that you can match them to the civilizations doing the naming: imperial, Indigenous, bureaucratic, devotional, whatever the politics of your fictional universe require.
Planet Names: A Working Naming Guide
A planet name should feel used, not arranged. Start with orbits, survey grids, atmosphere, geology, colonist slang, catalog numbers, old mission failures, and whatever the first settlers feared. Then decide what sort of world is being named, because a habitable planet, gas giant, rogue world, colony, dead rock, ocean world, or sacred homeworld asks for a different kind of word than a station. The generator can give you a quick spread, but the choice still has to sound like someone could say it while plotting a route, filing a colony complaint, reading a survey chart, dodging storms, or arguing over who named the place first. Keep a few candidates that disagree with each other. One may sound old enough to have enemies; another may feel like a cartographer cleaned it up too much. That friction is useful.
Who Gets to Name the Planet
Pick the naming authority before you fall in love with the syllables. Astronomers, pilots, settlers, corporations, soldiers, priests, and rebels shorten names in ways official registries rarely predict. A survey office wants tidy spelling. A pilot wants speed. A colony council, imperial office, mission crew, or company lawyer may all have a reason to push a different version. For planet names, the useful candidate usually reveals who wrote the first label and who kept saying the older word anyway. Read the name in a sentence of dialogue. If every character would pronounce it the same way, the planet may be too clean.
Language Care Before Style
Decide who named it: astronomers, pilots, settlers, corporations, soldiers, priests, or rebels. Official labels and living names split quickly in space. This is where many generated names go wrong. They borrow surface sound while ignoring who owns the language, whether the place is real, and what history the word may touch. Fiction gives you room to invent, but it does not make every source available for casual decoration. If you need a real cultural reference, narrow it to a specific region and period. If you are making a secondary world, decide what parts of the naming logic you are adapting and what parts you are leaving alone.
The Work Inside the Name
The planet needs work inside it. Maybe the name carries an orbit, ocean, desert, mineral, storm, sacred site, colony failure, or first landing that made the world matter. Maybe people kept using it because the official code failed under pressure. Let that practical reason roughen the name. A good result can hold an official story and a private one at the same time: the polished catalog entry, the clipped version on a chart, the older name used by settlers, the insult outsiders keep repeating. That layered feel matters more than a rare letter combination.
The Scene Test
Before keeping a result, run it through a small scene. Put it on a survey chart, in a settler's warning, on a shipping crate, and in the mouth of someone who wants the planet forgotten. For planet names, the winner should make one concrete promise about environment, danger, ownership, faith, trade, science, or memory. It should also leave room for a writer to disagree with it later. Planet names age. They get translated badly, shortened by crews, revived by colonists, sold by corporations, or cursed by people who left. Choose the one that can survive that kind of handling.