The Clue Dwarf planet since 2006
The Answer PLUTO
Pluto is a celestial body that was classified as a planet until 2006. In that year, scientists redefined what it means to be a planet, and Pluto was reclassified as a "dwarf planet." This change was based on its size and the fact that it shares its orbital zone with other objects. Today, Pluto remains the most famous dwarf planet in our solar system.