no but Eris isn't a planet it is a dwarf planet.
They are dwarf planets in our solar system.
The five dwarf planets in our solar system are Pluto, Eris, Haumea, Makemake, and Ceres.
CeresPlutoErisMakemakeHaumea
No, the planets after Pluto are still within our solar system. After Pluto, there is Eris, Haumea, Makemake, and several other dwarf planets and minor planets that are part of our solar system. Beyond these, there is the Kuiper Belt and the Oort Cloud which are also part of our solar system.
Ceres, Pluto, Makemake, Haumea, and Eris.
There are actually five dwarf planets: Ceres, Pluto, Haumea, Makemake, an Eris.
Of course they are "Dwarf Planets" like Pluto but: Makemake, Haumea, and Eris.
The 3 dwarf planets in our solar system are Pluto, Eris, and Haumea.
Pluto, Eris, Ceres, Haumea and Makemake are five dwarf planets in our solar system. There are many dwarf planets some discovered and some undiscovered.
The dwarf planets in our solar system are Pluto, Eris, Haumea, Makemake, and Ceres. These objects are similar to planets in size but have not cleared their orbits of other debris, which is one of the criteria for being classified as a planet.
If you count a dwarf planet, then yes: Eris was discovered in 2003 (but not identified until 2005). It is currently three times further from the sun than Pluto. Eris is larger than Pluto, and before the term "dwarf planet" was officially adopted in 2006, it was suggested that Eris had to be considered the solar system's tenth planet. If you don't count dwarf planets, then we actually lost a planet since the year 2000: In 2006, Pluto was downgraded from a planet to a "dwarf planet". In the year 2000 our solar system officially had nine planets, now it has eight. But it has three dwarf planets (Eris, Pluto, and Ceres).
Our solar system has Ceres, Pluto, Eris, Haumea, and Makemake as dwarf planets. A dwarf planet is smaller than a planet had has an orbit that is not clear.