Crafting believable geographical names for science fiction worlds requires balancing alien otherworldliness with linguistic accessibility for readers. The key is creating names that feel authentically foreign yet follow consistent phonetic and structural patterns that suggest real geological, astronomical, or terraforming processes.
Exoplanet Continents
Large landmasses on alien worlds, often named by human colonizers using scientific nomenclature mixed with classical languages to maintain cataloging standards.
Xerion Majoris
Great Desert Land (Greek/Latin hybrid)
Use Latin descriptors for formal stellar cartography; suggests Imperial or corporate naming conventions
Thallassos Primus
First Ocean Land
Perfect for water-rich worlds discovered by Earth-based explorers
Cryogaea
Frozen Earth
Scientific compound naming typical of research stations and academic settlements
Terraformed Regions
Areas actively modified by human technology, typically bearing names that reflect the cultural background of terraforming organizations or honor Earth locations.
New Valles
New Valleys (Spanish influence)
Shows cultural heritage of terraforming corporation or colonial group
Sino-Planitia
Chinese Plains
Reflects demographic reality of interstellar colonization funding
Genesis Basin
Creation/Birth depression
English names suggest either American colonization or lingua franca adoption
Gas Giant Atmospheric Layers
Distinct atmospheric zones in gas giants where floating cities or research stations operate, named for their thermal and visual characteristics.
Helios Stratam
Sun Layer
Useful for the upper, sunlit atmospheric zones of gas giants
Nox Thermals
Night Heat Currents
Perfect for the darker, convective regions where floating cities might exist
Cyclonic Reaches
Storm-dominated areas
Describes the dangerous zones between stable atmospheric habitats
Space Habitat Sectors
Distinct zones within artificial habitats, space stations, or generation ships, typically named for their function or orientation relative to Earth or spin gravity.
Centrifugal Gardens
Spinning agricultural zone
Describes artificial gravity agricultural areas in O'Neill cylinders
Hub Neutralis
Neutral central zone
Zero-gravity central areas of rotating habitats, often commercial or governmental
Earthward Terminus
End facing toward Earth
Shows psychological connection to home world in space-born populations
Alien Untranslatable Toponyms
Geographic features named by non-human species, representing concepts or perceptions that don't translate directly into human languages or geographical understanding.
Keth'morrigan
[electromagnetic resonance valley]
Use brackets to show human approximation of alien concepts; includes apostrophes for non-human phonemes
Zyx-Undulant
[memory-place-of-flowing]
Hyphenated constructions suggest compound alien concepts that resist direct translation
Vreth-Ka-Suun
[where-ancestors-dream-in-stone]
Triple construction indicates sacred or historically significant locations to alien cultures
Post-Apocalyptic Earth Regions
Regions of post-catastrophe Earth where familiar geography has been transformed by war, ecological collapse, or technological disaster.
The Glassed Reaches
Nuclear-fused desert areas
Evokes the aftermath of atomic warfare on familiar landscapes
Overgrown Sector 7
Nature-reclaimed urban zone
Bureaucratic numbering shows governmental collapse; 'overgrown' indicates rewilding
Dead Signal Valley
Communication-dead zone
Emphasizes technological loss and isolation in post-collapse societies
Naming tips
- Layer your names with colonization history—first scientific designations, then cultural renaming by settlers, sometimes reverting to indigenous alien names after cultural integration
- Use consistent phonetic patterns within each alien species' language, but make human mispronunciations of alien names show cultural contact
- Reflect the naming authority in your word choice: corporate sponsors create branded names, military expeditions use tactical designations, scientists use descriptive compounds
- Consider the scale of your geography—planetary features get formal names, local areas develop colloquial nicknames that reveal character culture
- Build environmental storytelling into names: 'New Eden' suggests optimistic terraforming, while 'Bitter Creek Station' implies harsh realities
- Use linguistic drift to show time passage—'Nova Moskva' might become 'Novmos' after centuries of colonial evolution
Remember that geographical names in science fiction serve as worldbuilding shortcuts, instantly conveying information about history, culture, and environment. The best sci-fi toponyms feel inevitable—as if they could only belong to the world you've created.