Video encyclopedia



Eris Facts And History: The Most Massive Dwarf Planet!


Eris: Queen of the Dwarf Planets


The Dwarf Planet Song (feat. Jessica Pace Lyells, Loki Alohikea, Jan van der Beek, and Sophia Oaks)


Eris -The World That Demoted Pluto (Beyond Pluto Episode 3) 4K UHD


Let's talk about the not-quite-planets of the solar system! #ceres #pluto #planets #space

Eris is the most massive and second-largest dwarf planet in the known Solar System. Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown, and its identity was verified later that year. In September 2006 it was named after Eris, the Greek goddess of strife and discord. Eris is the ninth most massive object directly orbiting the Sun, and the 16th most massive overall, because seven moons are more massive than all known dwarf planets. It is also the largest which has not yet been visited by a spacecraft. Eris was measured to be 2,326 ± 12 kilometers (1,445.3 ± 7.5 mi) in diameter. Eris's mass is about 0.27% of the Earth mass, about 27% more than dwarf planet Pluto, although Pluto is slightly larger by volume.
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  • Discovery 

  • Name 

  • Classification 

  • Orbit 

  • Size, mass and density 

  • Surface and atmosphere 

  • Satellite