Eris

Pluto, Eris and the many other Kuiper Belt objects are far too different to be lumped in with the eight official planets, he said.

Understandably enough, nobody liked Eris as she was always causing trouble.

The one hope Pluto fans had for revenge was that it was very tough to pin down Eris' size exactly.

As Brown writes on his blog, "explaining why Pluto and Eris are so different is going to keep us busy for many years, I suspect. "

Furious at having been left off of the invitation list again, Eris decided to make trouble.

The scientist who discovered Eris, Caltech astronomer Mike Brown, thinks Pluto's demotion was the right move.

Pluto may be a few tens of kilometers smaller than Eris, or a few tens of kilometers bigger.

Should Eris, and many other objects circling the sun beyond Neptune's orbit?

Eris was thought to be bigger than Pluto until Nov. 6, when astronomers got a chance to recalculate Eris' size.

What does matter a lot is Eris' surprisingly large mass, which means it has considerably more rock underneath its icy surface than Pluto.

Eris is just slightly larger than Pluto, but orbits as far as twice Pluto's distance from the Sun.

An artist's picture of the solar system, released by the European Space Agency. Ceres, Pluto and Eris are not shown .

The plane of Eris ' orbit is well out of the plane of the Solar System's planets.

He thinks Eris is a fitting name for the new dwarf planet because astronomers have argued for so long over how to define a planet.

Eris is about 9 billion miles (15 billion kilometers) from the sun at its farthest orbital point, making it about twice as distant as Pluto.

Thus, from the wedding of Peleus and Thetis and the golden Apple of Discord thrown by Eris, we have the beginnings of the Trojan War.

Also located in this area, but far beyond the range of amateur telescopes, is the dwarf planet Eris.

Eris is shown above in an image taken by a 10-meter Keck Telescope from Hawaii, USA.

Dwarf planets Pluto and Eris are trans-Neptunian objects that orbit in the Kuiper belt of objects past Neptune.

In the above drawing, a scientific artist has imagined Eris and Dysnomia orbiting our distant Sun.

Like Pluto, Eris has a moon, which has been officially named by the International Astronomical Union as (136199) Eris I (Dysnomia).

All of the gods attended except Eris, the goddess of discord, and the daughter of Zeus and Hera.

Eris was discovered in 2003, and is likely composed of frozen water-ice and methane.

Will Planet X or Eris approach the Earth and threaten our planet with destruction?

The mass was calculated by timing the orbit of Eris ' moon Dysnomia.

And these guys orbited a 30 -- or no, about a 22 mile long asteroid called Eris.

If you go to the Verizon store, you can buy an HTC Droid Eris.

Eris is real, but it is a dwarf planet similar to Pluto that will remain in the outer solar system;

Once inscribed with goddess Eris'words of retaliation