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

open Global / Unspecified, Global WS02106
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.
Added by: Ian Patel
Created at: 2026-07-22T08:00:00Z
Horizon: 2028
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WS02106 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=2106

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