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Planet Nine

Hypothesised ninth planet in the outer solar system

Also: Planet 9

In 1 article · first seen · latest

Vera C. Rubin Obser...Vera C. Rubin Observatory: in the same stories2026 ED1382026 ED138: in the same storiesDwarf planet 2026 E...Dwarf planet 2026 ED138: in the same storiesPlanet Nine

Solid lines: relations reported in articles. Dashed: appear in the same stories. Thicker means more evidence.

Timeline

  1. 2 Nov 2026 · 2 outlets

    Rubin Observatory team reports 2026 ED138, a possible large dwarf planet beyond Pluto