Generate a random constellation from across the night sky, from familiar landmarks to obscure far-southern figures -- each drawn as a real star chart from catalog data.
A constellation is a named region of the sky rather than a physical group of stars: those in one may lie hundreds of light years apart and merely appear adjacent from Earth. The International Astronomical Union fixed the list at 88 in 1922 and drew formal boundaries in 1930, so every point in the sky now falls inside exactly one. Most northern constellations descend from Greek and Babylonian figures, while the southern ones were largely invented by European navigators between the 16th and 18th centuries. Recognisable patterns like the Big Dipper and the Summer Triangle are asterisms, not constellations in their own right.
This generator draws from all 88 IAU constellations across eight traditional families -- Zodiac, Ursa Major, Perseus, Hercules, Orion, Heavenly Waters, Bayer, and Lacaille -- from famous night-sky landmarks like Orion and Ursa Major to faint far-southern figures most stargazers have never traced.
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.
Amateur astronomers use it to pick a target for a night of stargazing or to learn a new corner of the sky. Writers, game designers, and worldbuilders use it to name a ship, a chapter, a faction, or a fantasy setting's night sky. It's also a fun way to pick a name for a pet, project, or username, or to test how many constellations you can actually find overhead.
Generate draws one constellation at random from the full 88-entry pool using the site's cryptographically secure randomness, guaranteed not to repeat whatever result is currently showing in single-result mode. Filtering by family narrows the pool before drawing, and each single result comes with a short description of what the constellation depicts, a notable feature, and when it's best seen.
A sample of what this generator can draw, spread evenly across the full list:
Yes -- all 88 constellations formally recognized by the International Astronomical Union are included, nothing invented or left out.
Yes -- use the filter button to pick one or more of the eight families. Generate will then only draw from constellations in the families you've selected.
Not in single-result mode -- each new roll is guaranteed to differ from the one currently on screen.
Yes -- far-southern constellations like Crux, Centaurus, and the Bayer and Lacaille families sit alongside familiar northern figures like Orion and Ursa Major.
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