Portal:Astronomy/Picture/59
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5b/Eris_and_dysnomia2.jpg/360px-Eris_and_dysnomia2.jpg)
Eris (minor planet designation 136199 Eris) is the most massive and second-largest known dwarf planet in the Solar System. Image of Eris (center) and Dysnomia (left of center), taken by the Hubble Space Telescope