Generate a random exoplanet, from scorching hot Jupiters to worlds in the habitable zone, for worldbuilding, trivia, or learning something new about the planets beyond our solar system.
An exoplanet is a planet orbiting a star other than the Sun. The first confirmed around a Sun-like star was found in 1995; more than 5,000 are now catalogued. Most were detected indirectly rather than photographed -- by the dip in a star's brightness as a planet transits it, or by the star's wobble under the planet's gravity. Both methods favour large planets orbiting close in, so the catalogue reflects what is easiest to detect rather than what is most common.
Thousands of exoplanets have been confirmed since the first was detected in the 1990s, so this generator draws from a curated selection of real, notable, well-studied worlds across five categories -- Hot Jupiters, Super-Earths, Rocky & Terrestrial, Gas & Ice Giants, and Potentially Habitable -- from the first planet ever found around a Sun-like star to the closest known world beyond our solar system.
Every result here is drawn using crypto.getRandomValues() -- the Web Crypto API's cryptographically secure randomness -- instead of Math.random(), so it's genuinely unpredictable, not just statistically random. Learn more.
Writers and game designers use it to name a starship's destination, a sci-fi setting, or a spot on a star map. Teachers and students use it to spark a quick research prompt or trivia round about real astronomy. It's also a fun way to discover a new-to-you world, settle on a space-themed name for a project or pet, or just see how strange and varied confirmed exoplanets really are.
Generate draws one exoplanet at random from the full pool using the site's cryptographically secure randomness, guaranteed not to repeat whatever result is currently showing in single-result mode. Filtering by category narrows the pool before drawing, and each single result comes with a short description of the planet alongside its name.
A sample of what this generator can draw, spread evenly across the full list:
All of them are real, confirmed exoplanets, including their descriptions -- nothing here is invented.
Yes -- use the filter button to pick one or more of the five categories. Generate will then only draw from planets in the categories you've selected.
Not in single-result mode -- each new roll is guaranteed to differ from the one currently on screen.
Yes -- headline-making worlds like the TRAPPIST-1 system, Proxima Centauri b, and Kepler-452b are in the pool alongside more obscure but scientifically notable planets.
Planet · Moon · Star · Galaxy · Nebula · Asteroid or Comet