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Category Text Generators

Celestial Category Type of celestial object to name

Number of Names Generate 1–50 names at once

Seed (optional) Same seed = same names. Leave blank for random.

Name Style Phonetic flavor of generated names

Quick Presets:

Select a category and click Generate Names

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About

Astronomical nomenclature follows strict conventions maintained by the International Astronomical Union (IAU). Star names derive from Arabic (Aldebaran, Betelgeuse), Greek (Sirius), and Latin roots. Catalog designations use systematic formats: Bayer letters (α Centauri), Flamsteed numbers, or survey prefixes like HD, NGC, and PSR. This generator reconstructs those linguistic patterns using morpheme dictionaries extracted from 400+ real celestial names and applies phonotactic constraints to produce results that sound authentic rather than random.

The tool operates across 5 celestial categories, each with distinct phonological rules. Star names favor 2 - 4 syllable Arabic/Greek morphemes. Exoplanet designations append lowercase letter suffixes to parent star names per IAU convention. Galaxy and nebula names blend catalog-style alphanumeric codes with poetic descriptors. Results approximate real naming patterns but are fictional. Verify uniqueness against the SIMBAD database if using names for published work.

Formulas

Name generation uses weighted morpheme assembly with phonotactic filtering. Each celestial category defines a morpheme set M partitioned into positional slots:

Name = P_prefix ⋅ R_root ⋅ S_suffix

where P is drawn from the prefix set with probability weight w_i, R from root morphemes, and S from suffix morphemes. Selection probability for morpheme m_i is:

p(m_i) = w_in∑j=1 w_j

A phonotactic filter rejects combinations where consecutive consonant clusters exceed length 2, or where vowel sequences exceed length 3. Catalog-style names use the format:

CatalogName = Prefix + + floor(rand() × 10^d)

where d ∈ {3, 4, 5, 6} controls digit count per category convention. Exoplanet names append a lowercase letter (b - h) to a generated star name, following IAU convention where b denotes the first discovered planet.

Reference Data

Category	Naming Convention	Real Example	Origin Language	Typical Pattern
Star (proper)	IAU proper name	Betelgeuse	Arabic	2-4 syllable, vowel-rich
Star (Bayer)	α/β/γ + Genitive	α Centauri	Greek + Latin	Greek letter + constellation genitive
Star (Flamsteed)	Number + Genitive	61 Cygni	Latin	Integer + constellation genitive
Star (catalog)	Prefix + Number	HD 209458	Survey code	2-3 letter prefix + digits
Exoplanet	Star name + letter	Kepler-442b	Mixed	Parent star + lowercase letter
Galaxy (Messier)	M + Number	M31	French catalog	M + 1-3 digit number
Galaxy (NGC)	NGC + Number	NGC 4486	English catalog	NGC + 4 digit number
Galaxy (proper)	Descriptive name	Whirlpool Galaxy	English	Adjective/Noun + Galaxy
Nebula (proper)	Descriptive name	Eagle Nebula	English	Noun + Nebula
Nebula (catalog)	NGC/IC + Number	IC 1396	English catalog	Prefix + 3-4 digit number
Constellation	Latin genitive	Orionis	Latin	2nd/3rd declension genitive
Pulsar	PSR + Coordinates	PSR B1919+21	Survey code	PSR + RA±Dec
Asteroid	Number + Name	433 Eros	Greek/Roman	Integer + mythological name
Moon	Mythological figure	Europa	Greek/Roman	Deity/character name
Dwarf planet	Mythological creator	Makemake	Polynesian	Creation deity name
Comet	Discoverer + Year	Halley	Surname	Surname or C/Year + code
Star cluster	Catalog or name	Pleiades	Greek	Mythological group name
Quasar	Survey + Coordinates	3C 273	Survey code	Prefix + number
Black hole	Galaxy core or name	Sagittarius A*	Latin	Constellation + designator
Binary star	Name + A/B	Sirius B	Mixed	Primary name + uppercase letter

Frequently Asked Questions

The generator uses morpheme dictionaries extracted from real celestial name etymologies. Arabic roots (al-, abd-, beth-), Greek stems (-ius, -on, -ara), and Latin genitives (-oris, -ae, -ium) are combined following phonotactic rules that prevent unpronounceable consonant clusters. Each morpheme carries a frequency weight derived from its prevalence in the IAU catalog of 400+ named stars.

Yes. Because the generator uses authentic morpheme patterns, collisions with real names are possible though statistically rare. The combinatorial space exceeds 10⁶ unique names per category. For published work (fiction, games, academic papers), cross-reference results against the SIMBAD astronomical database (simbad.u-strasbg.fr) or the IAU Working Group on Star Names catalog.

Per IAU convention, the lowercase letter "a" is implicitly reserved for the parent star itself. The first confirmed exoplanet in a system receives designation "b", the second "c", and so on in order of discovery (not orbital distance). This generator follows that convention. The letter suffix range spans b through h, representing systems with up to 7 confirmed planets.

Each category has a target syllable range. Stars: 2-4 syllables (matching Arabic/Greek patterns like Aldebaran at 4 syllables). Moons: 2-3 syllables (matching Io, Europa, Titan). The generator counts vowel nuclei in the assembled morpheme string and rejects candidates outside the target range, then re-rolls.

Catalog designations are alphanumeric codes assigned by sky surveys. NGC (New General Catalogue) uses 4-digit numbers. HD (Henry Draper) uses up to 6-digit numbers. PSR (Pulsar) encodes right ascension and declination coordinates. The generator replicates these formats with randomized but format-valid numbers. Proper names are linguistic constructions with etymological roots.

Yes. Entering the same seed text with the same category and count settings will always produce identical names. The seed string is hashed to a 32-bit integer using a djb2 hash function, which initializes a Mulberry32 pseudo-random number generator. This allows reproducible results for collaborative worldbuilding projects.