About Astrodle
Astrodle gives you one irreversible discovery per day: a single real astronomical object, pulled from a curated, versioned catalog of the known universe. It might be a star, an exoplanet, a pulsar, a nebula, a star cluster, a galaxy, a black hole, or a body of our own Solar System.
The draw is yours and private — everyone reaches into the same universe and pulls out a different object. There are no re-rolls and nothing to buy. Your discovery is a pure function of your anonymous id and the UTC date, so a refresh always returns the same result, and it resets at 00:00 UTC.
Where it comes from
Astrodle takes its once-a-day locked loop from number games in the “-dle” tradition — one roll per day, a glanceable result, discovered properties, explainable rarity and an accumulating collection — and replaces the random number with a real, cited astronomical object. The catalog is built at release time from published surveys and databases; no live astronomy service is queried while you play, and no result copy is generated by AI.
The honesty contract
Every result is held to five rules:
- Real record. The object exists in a cited astronomical database.
- Clear status. It is shown only as specifically as its source supports. A quasar is never relabelled as a black hole.
- Useful identity. A preferred name, its physical nature, where it is, and a few meaningful facts.
- Source honesty. Measured, derived and estimated values stay distinguishable.
- Visual honesty. The artwork is a data-inspired illustration built from the catalogue record — labelled as such, never a photograph passed off as real.
“Rarity” in Astrodle describes the released catalog and the draw rules — it never claims the true cosmic abundance of an object type.
What Astrodle stores
Play anonymously and it is one cookie plus your seven most recent discoveries, kept on that device. A free, optional account adds your email address and syncs your full history across devices. The production site also runs Google Analytics. Full detail on the privacy page.