Eris is more massive than Pluto
The dwarf planet Eris, discovered in 2005, surprisingly outweighs Pluto, playing a key role in the reclassification of planets and highlighting the Kuiper Belt's diversity.
The dwarf planet Eris, discovered in 2005, surprisingly outweighs Pluto. Eris has an estimated mass of 1.66 × 10^22 kilograms, making it about 27% more massive than Pluto, which measures 1.31 × 10^22 kilograms. This mass difference comes from Eris's higher density, suggesting a rich composition of rock and ice.
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