Why is Eris not considered a planet?

It takes 557 Earth years for Eris to make one orbit around the Sun. Eris does not clear out its orbit, so it did not meet one of the requirements. Consequently, it was placed in the newly created category of dwarf planet along with Pluto and Ceres, which also did not meet all of the requirements to be called a planet.

How is Eris different from Pluto?

Eris is one of the largest known dwarf planets in our solar system. It’s about the same size as Pluto but is three times farther from the Sun. Pluto, Eris, and other similar objects are now classified as dwarf planets. Eris was discovered on Jan.

Why does Eris have more mass than Pluto?

The measurement also means that Eris, another Kuiper Belt object, is actually smaller in size than Pluto. When Eris was discovered in 2005, its brightness led scientists to suspect that it was larger than Pluto. But Eris is still more dense and therefore more massive.

How big is Pluto vs Eris?

The observations helped scientists determine that Eris’ diameter is 1,445 miles (2,326 kilometers), give or take 7 miles (12 km). That makes it slightly smaller than Pluto.

What are 3 interesting facts about Eris?

Facts about Eris:

• Eris is why Pluto got demoted.
• Eris was almost considered our 10th planet.
• The discovery of Eris lead to the classification of ‘Dwarf Planets’.
• It was named after the Greek goddess of chaos.
• Eris was first nicknamed “Xena”.
• Eris has only one moon.

What are 5 facts about Eris?

10 Facts About the Dwarf Planet Eris

• An Eridian day is just slightly longer than Earth’s.
• Eris was once thought to be bigger than Pluto.
• Eris is responsible for the big debate over the definition of “planet.”
• It has its own moon.
• Initially, Eris was called Xena.
• Its surface is like Pluto’s heart.