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 trans-Neptunian object previously known as 2003 UB313 and nicknamed Xena has been officially named Eris, after the Greek goddess of discord. Eris's discovery precipitated the International ...

Munich: The International Astronomical Union announces the names (136199) Eris for the dwarf planet provisionally named 2003 UB313 and Dysnomia for its moon. The dwarf planet formerly known as 2003 ...

WASHINGTON : 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 ...

This artist's impression shows the distant dwarf planet Eris. New observations have shown that Eris is smaller than previously thought and almost exactly the same size as Pluto. Eris is extremely ...