Eris was one of the first dwarf planets to be discovered in the solar system. It is almost the same size as Pluto, and its discovery directly led to the former ninth planet's demotion.

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

Eris was assigned to this new category, and Pluto lost its status as a planet. Other celestial bodies, including Haumea, Ceres, and Makemake, have been classified as dwarf planets. Artist’s ...

Eris, the dwarf planet whose 2005 discovery led to Pluto losing its status as a planet, has passed in front of a star, providing astronomers with the clearest view of it since it was identified.

Dwarf Planet Eris Is More Massive Than Pluto Date: June 18, 2007 Source: NASA Summary: Aptly named after the Greek goddess of conflict, the icy dwarf planet, Eris, has rattled the general model of ...

The distant dwarf planet Eris could be an 'almost perfect' twin of pluto, scientists say. The two small worlds are nearly identical in size.

The dwarf planet Eris — once thought to be the largest body in the solar system beyond Neptune's orbit — may actually be smaller than Pluto, new observations suggest. IE 11 is not supported.

Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches. While Pluto was ...

Eris is about the size of Pluto but around 50% farther from the sun. The discovery of Eris in the Kuiper Belt beyond Neptune in 2005 prompted the debate that ultimately reclassified Pluto as a dwarf ...

Dwarf Planet Eris' Shadow Path During November 2010 Occultation ESO/L. Calçada This artist’s impression shows the shadow of the dwarf planet Eris as it was crossing the Earth during the ...

The discovery of Eris in the Kuiper Belt beyond Neptune in 2005 prompted the debate that ultimately reclassified Pluto as a dwarf planet. It was an interest in Pluto that drew UC Santa Cruz ...