What is Eris?
Q: What is Eris?
A: Eris is a dwarf planet and a trans-Neptunian object (TNO) and is the second-largest known dwarf planet in the Solar System.
Q: How does Eris compare in size and mass to Pluto?
A: Eris is slightly smaller than Pluto, but it has more mass than Pluto.
Q: Where is Eris located in the Kuiper belt?
A: Eris is a "scattered disc object" in the Kuiper belt and is located further out than Pluto.
Q: Why is Eris also called a plutoid?
A: Eris is also called a plutoid because the International Astronomical Union (IAU) decided to rename all trans-Neptunian dwarf planets as plutoids.
Q: What is the orbital period of Eris?
A: Eris orbits the sun once every 557 Earth years.
Q: What is the inclination angle of Eris' elliptical orbit?
A: Eris' elliptical orbit is inclined at an angle of 44° between the plane of the orbit of the planet and the ecliptic, the plane containing Earth's orbital path.
Q: Does Eris have any moons?
A: Yes, Eris has one moon called Dysnomia.
