Exoplanet Name Generator

An exoplanet (extrasolar planet) is a planet that orbits a star outside our solar system. The first confirmed exoplanet was discovered in 1992, and since then, astronomers have confirmed over 5,500 exoplanets across more than 4,000 planetary systems. These alien worlds range from rocky Earth-like planets to massive gas giants larger than Jupiter.

Real exoplanets follow a systematic naming convention: [Telescope/Mission Name]-[Star Number][Letter]. For example, Kepler-452b means it was discovered by the Kepler telescope, orbiting star #452 in its catalog, and it's the second planet found (b = second, c = third, etc.). The letter 'a' is reserved for the star itself. Popular missions include Kepler, TESS, CoRoT, WASP, and TRAPPIST.

As of 2024, over 5,500 confirmed exoplanets have been discovered, with thousands more awaiting confirmation. NASA's TESS mission alone has identified over 6,000 candidates. Scientists estimate there could be billions of exoplanets in our Milky Way galaxy alone, with an average of at least one planet per star.

Some of the most famous exoplanets include: Proxima Centauri b (the closest exoplanet at ~4.2 light-years), TRAPPIST-1e (a potentially habitable world in a 7-planet system), Kepler-452b (often called "Earth's cousin"), 51 Pegasi b (the first exoplanet found around a Sun-like star), and WASP-12b (a "hot Jupiter" being torn apart by its star).

Our generator combines authentic astronomical naming patterns with creative algorithms. The Scientific style mimics real mission catalogs (Kepler, TESS, WASP). The Mythological style draws from global mythology. The Sci-Fi Creative style generates unique alien names, while Hybrid blends all approaches. Each planet also receives randomized physical parameters for added realism.

Absolutely! All names generated by this tool are free to use for any purpose — science fiction writing, game development, worldbuilding, RPG campaigns, educational projects, or even naming your own creative works. The names are algorithmically generated and not tied to any real astronomical designations (unless coincidentally matching).

The Earth Similarity Index (ESI) is a scale from 0 to 1 that measures how similar a planet is to Earth based on radius, density, escape velocity, and surface temperature. An ESI of 0.8–1.0 suggests a potentially Earth-like world. In our generator, ESI values are simulated to give each planet a realistic profile — planets with high ESI (>0.8) get a special "Potentially Habitable" tag.

Exoplanets come in many varieties: Terrestrial planets (rocky, Earth-like), Super-Earths (1–2x Earth's size, rocky), Mini-Neptunes (2–4x Earth, gaseous), Gas Giants (Jupiter-like), Ice Giants (Neptune-like), Lava Worlds (extreme heat), and Ocean Worlds (covered in water). Our generator randomly assigns these types with realistic parameters for each.

The main methods include: Transit Method (detecting dips in starlight when a planet passes in front), Radial Velocity (measuring star wobble due to planetary gravity), Direct Imaging (photographing the planet), Gravitational Microlensing, and Astrometry. The transit method, used by Kepler and TESS, has discovered the most exoplanets to date.

A potentially habitable planet resides in the "Goldilocks Zone" — the orbital region where temperatures allow liquid water to exist on the surface. Key factors include: right distance from its star, suitable atmospheric pressure, a stable climate, and a rocky composition. In our generator, planets with ESI > 0.8 and moderate temperatures receive the "Potentially Habitable" or "Goldilocks Zone" tag.