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| Average distance from the Sun | 5,535,121,215 km / 37 AU — 14,510,993,457 km / 97 AU |
| Diameter | approximately 2,500 km |
| Mass | 1.6e22 kg |
| Orbital period around the Sun | 557 Earth years / 203,600 Earth days |
| Number of moons | 1, Dysnomia |
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| Eris, originally nicknamed Xena, is around the same size as Pluto, which is about 2,330 km across. Its elongated orbit takes it far outside of the main region of the Kuiper belt. Due to Eris's eccentric orbit, Eridian surface temperature is estimated to vary between about 30 and 56 kelvin (−243 and −217 degrees Celsius). | |
Our Solar System
Our solar system is located on the edge of a spiral arm called Orion’s Arm, and is one-half to two-thirds of the way (28,000 light-years) from the center of our Milky Way galaxy.The Sun, Sol
The Inner Planets
Mercury
Venus
Earth
The Moon
Mars
The Asteroid Belt
Dwarf planet, Ceres
Asteroid, Ida
Asteroid, Vesta
Asteroid, Eros
The Outer Planets
Jupiter
Saturn
Uranus
Neptune
The Kuiper Belt
Dwarf planet, Pluto
Dwarf planet, Eris
The Oort Cloud
Dwarf planet, Sedna
Comet Halley
Comet Hale-Bopp
Glossary of Terms
