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Discover how astronomers found a possible new dwarf planet, 2026 ED138, hiding beyond Pluto — an icy world about 46 times farther from the Sun than Earth, taking 281 years to complete one orbit. Learn how the Vera C. Rubin Observatory in Chile spotted it, why its tilted orbit points to Neptune's gravity, and what infrared observations must confirm before it joins Pluto, Ceres, Eris, Haumea and Makemake as the sixth dwarf planet. Keywords: dwarf planet, 2026 ED138, Rubin Observatory, Pluto, trans-Neptunian object, Matthew Holman, Minor Planet Center, solar system, astronomy, space, science
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