Pluto, You Have A Twin! Eris Accurately Sized-Up

I covered Planet Pluto in my most recent Solar System share and we are moving on to a relatively new discovery of a Pluto twin Dwarf planet in the far reaches of our outer Solar System.

Here is Dwarf Planet Eris

Our Solar System beyond the 8th Rock from the Sun -

"Eris is the most massive and second-largest dwarf planet known in the Solar System. Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown, and its discovery was verified later that year. In September 2006 it was named after Eris, the Greek goddess of strife and discord.z" Wikipedia
Orbital period: 558 years
Radius: 722.65 mi
Discovered: January 5, 2005
Surface area: (1.70±0.02)×107 km2
Moon: Dysnomia

"When Eris was first discovered in 2005, it was thought to be significantly larger than Pluto. Originally, it was submitted as the tenth planet in the solar system. Ultimately, however, Eris' discovery was a big reason astronomers demoted Pluto to dwarf planet status in 2006. That decision remains controversial to this day, making Eris' name fitting.

"Eris is the Greek goddess of discord and strife," astronomer Mike Brown, a member of the discovery team, said via NASA. "She stirs up jealousy and envy to cause fighting and anger among men. At the wedding of Peleus and Thetis, all the gods were invited with the exception of Eris, and, enraged at her exclusion, she spitefully caused a quarrel among the goddesses that led to the Trojan War.”

Like almost all of the known dwarf planets (with the exception of Ceres), Eris lies in the Kuiper Belt that rings the outer solar system. But Eris is even farther-flung than Pluto, circling our star from about three times farther away. It takes 561 years for the distant dwarf planet to make a single trip around the sun, though it rotates once every 25 hours, making the length of its day very similar to a day on Earth." Science & Astronomy