eris

/ˈɛrɪs/
noun
  1. In Greek mythology, the goddess of strife, discord, and chaos.
    • In ancient stories, Eris is often shown as a troublemaker who delights in conflict.
    • The myth says Eris threw a golden apple into a wedding feast, sparking a famous quarrel.
    • Eris was known for causing arguments among the gods and mortals alike.
  2. A dwarf planet in our solar system, discovered in 2005, located beyond Neptune.
    • Astronomers study Eris to learn more about the outer reaches of our solar system.
    • The discovery of Eris led to a new classification for planets and dwarf planets.
    • Eris is one of the largest known dwarf planets in the Kuiper Belt.