Eris is a trans-Neptunian object and one of the numerous bodies recognized as a dwarf planet located primarily within the scattered disk of the solar system. It is characterized by its considerable distance from the Sun and its composition, which suggests an icy core mixed with rock. Its orbital parameters place it among the most distant and massive known dwarf planets, making it an important subject for understanding the formation and dynamics of the outer reaches of the solar system. Scientific study of Eris contributes to models of planetary migration and the composition of primordial matter beyond the influence of the major gas giants.