The Controversial 10th Planet

Eris, discovered in 2005, is a dwarf planet located in the scattered disk region beyond Neptune. Initially considered the solar system's 10th planet, Eris challenged the traditional definitions of what constitutes a planet. This led to a reclassification and the introduction of the term "dwarf planet" by the International Astronomical Union in 2006. Eris is notable for its size, being one of the largest known dwarf planets, and for its highly reflective surface, which suggests it is covered in a layer of ice. Its discovery played a crucial role in reshaping our understanding of the solar system's structure and the classification of celestial bodies.

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