WASHINGTON (Reuters) - 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.

(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 ...

For three-quarters of a century, schoolkids learned that our solar system has nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. But things changed nearly five ...

The small icy worlds on the edge of our solar system may be better contenders for life than we first thought, scientists have found. The dwarf planets of Eris and Makemake, situated in the Kuiper Belt ...

The first Eris rocket from GIlmour Space Technologies lifts off July 29 (U.S. time) on a short-lived test flight. Credit: GIlmour Space Technologies WASHINGTON — The first flight of an orbital rocket ...

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 ...

Eris is the largest dwarf planet in the Solar System, and the ninth largest body orbiting our Sun. Sometimes referred to as the “tenth planet,” its discovery is responsible for upsetting the ...

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 ...