Eris is the largest known dwarf planet in the solar system.

It is a trans-Neptunian object (TNO), orbiting the Sun in a region of space known as the scattered disc, just beyond the Kuiper belt, and accompanied by at least one moon, Dysnomia.

Eris' size resulted in its discoverers and NASA labelling it the solar system's tenth planet.

This, along with the prospect of other similarly sized objects being discovered in the future, stimulated the International Astronomical Union (IAU) to define the term "planet" more precisely.

Under a new definition approved on August 24, 2006, Eris was designated a "dwarf planet" along with Pluto and Ceres..

For more information about the topic Eris (dwarf planet), read the full article at Wikipedia.org, or see the following related articles:

Dysnomia (moon of Eris) — 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 ...  > read more

Ceres (dwarf planet) — Ceres, also designated 1 Ceres or (1) Ceres, is the smallest dwarf planet in the Solar System and the only one located in the main asteroid belt. ...  > read more

Precession — Precession refers to a change in the direction of the axis of a rotating object. In certain contexts, "precession" may refer to the precession that ...  > read more

Charon (moon) — Charon, discovered in 1978, is, depending on the definition employed, either the largest moon of Pluto or one member of a double dwarf planet with ...  > read more

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