Dysnomia, is a moon of the dwarf planet Eris. The satellite is about 60 times fainter than Eris, and its diameter is estimated to be approximately eight times smaller. Astronomers now know that three ...

Two nearly-identically sized worlds — Eris and Pluto — float distantly in the same frozen region of our outer solar system. A NASA spacecraft has visited Pluto, but not Eris, and each is so distant ...

The largest known object at the fringes of the solar system, the icy body whose discovery heated up the debate about planethood, has an apt new name. The International Astronomical Union (IAU) ...

LOS ANGELES – A distant, icy rock whose discovery shook up the solar system and led to Pluto's planetary demise has been given a name: Eris. The christening of Eris, named after the Greek goddess of ...

This story was updated at 7:45 p.m. ET, Nov. 9. 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 ...

(Above: An artist concept of the dwarf planet Eris. The sun is the small star in the distance. Courtesy NASA/JPL-Caltech) (WHTM) — In 2005 the team of Mike Brown, Chad Trujillo and David Rabinowitz ...

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 explored by ...

LOS ANGELES — A distant, icy rock whose discovery shook up the solar system and led to Pluto’s demise as a planet has been given a name: Eris. The christening of Eris, named after the Greek goddess of ...

A distant, icy rock whose discovery shook up the solar system and led to Pluto's planetary demise has been given a name: Eris. The christening of Eris, named after the Greek goddess of chaos and ...

Three times more distant from the Sun than Pluto (almost 10 billion miles), Eris is the largest dwarf planet in the Solar System. It takes Eris more than twice as long to orbit the Sun as Pluto (about ...