Eris

Eris — dwarf planet, explore its interactive 3D model in Cosmoscope.

Explore Eris in a live 3D Solar System. Follow its calculated motion and inspect real astronomical data, distances and orbital facts.

The discovery that demoted Pluto. Slightly smaller but more massive than Pluto, this frozen world wrapped in methane ice forced astronomers to invent the term “dwarf planet”.

Radius

1,163 km — nearly Pluto’s twin

Discovered

2005 — Mike Brown’s team

Year

~559 Earth years

Distance

38–98 AU (highly eccentric)

Moon

Dysnomia

Region

Scattered disc

Explore Eris in 3D

Cosmoscope places Eris in the Solar System using astronomical ephemeris or orbital elements, updated for the simulation time. Explore its calculated motion, distance and orbital facts in the interactive 3D view. Accuracy depends on the orbital model and its valid time range.