World Solve — A living repository of problems worth solving.

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World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

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We have not definitively located the hypothetical Planet Nine in the outer Solar System.

open Global / Unspecified, Global

Gravitational clustering of trans-Neptunian objects suggests an unseen massive planet beyond Pluto. Deep wide-field survey software and ultra-sensitive infrared observatories are required to pinpoint its coordinates.

planet definitively located hypothetical nine technology-computing

WS02106 · Logged by Ian Patel on 2026-07-22T08:00:00Z · Horizon: 2028 · Working on: 0

Citation ID: WS02106 Title: We have not definitively located the hypothetical Planet Nine in the outer Solar System. URL: https://www.worldsolve.org/index.php?api=problem&id=2106

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