Eris

Eris is the 5th Dwarf Planet from the Sun. It is white in color and Pluto and Eris are very close in size.

Overview
Eris is like the Jupiter of the dwarf planets in our solar system because Eris is the largest dwarf planet in our Solar System. The dwarf planet was named for Eris, the Greek goddess of strife and discord. This is quite fitting, as there was some dispute over the classification when it was discovered. Rejected names for the planet include Xena (from the TV show), Lila, and Persephone (Pluto/Hades’ wife in Greek mythology). Eris has only one satellite or moon named Dysnomia. and takes 16 Earth days to complete a full orbit. Dysnomia is named for the daughter of the goddess Eris in Greek mythology and is the Greek goddess of lawlessness. Eris was also once considered to be the 10th planet of the Solar System before the reclassification of Pluto in 2006. This is due to the large size of Eris, which exceeds Pluto’s mass by 28%. All of the objects located in the Asteroid Belt, located between Mars and Jupiter, could fit inside Eris – even though it is only 2/3 the diameter and 1/3 the volume of Earth’s Moon. Eris is so far from the Sun that its atmosphere sometimes freezes due to lack of sunlight. Over the course of the hundreds of years it takes the dwarf planet to orbit the Sun, it thaws as it gets closer to the Sun’s heat. Scientist believe that the surface of Eris is rocky, similar like Pluto's rocky surface. It is believed that Eris was originally located inside the Kuiper belt, but that gravitational interactions with Neptune as the solar system formed forced the dwarf planet out into the scattered disc region.