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Because both of them not meet the terms to considered as a planet.
The technical reason given is: They have not cleared the regions of their orbits of other objects.
Unfortunately that's not a nice simple reason.
Pluto was only redefined from planet to "dwarf planet" in the year 2006.
The problem was that astronomers kept finding new objects in this part of space.
What else can I help you with?
Pluto Ceres and Eris are all what kind of planets?
Dwarf Planets.
What is the name of the dwarf planets in the solar system?
Their are more than 3 dwarf planets. Some of the famous ones are Pluto and Ceres.the three dwarf planets are Ceres Pluto and ErisThe three dwarf palnets are Pluto, Eris, and CeresPluto, Eris, and Ceres
What are Pluto and Eris?
They are dwarf planets in our solar system.
What are the names of the dwaf planets?
there are 3 dwarf planets and their names are Ceres Pluto Eris ( they were in order)
Are Eris and Ceres dwarf planets?
Yes, along with Pluto.
Are Pluto Eris and Ceres all dwarf planets?
Yes they are.
What newest planets discovered in the solar system after Pluto?
Of course they are "Dwarf Planets" like Pluto but: Makemake, Haumea, and Eris.
What are all the five dwart planets in your solar system?
The five dwarf planets in our solar system are Pluto, Eris, Haumea, Makemake, and Ceres.
Do more planets exist beyond Pluto?
Eris is a dwarf planet that exists beyond Pluto
Should Eris be a planet?
No. scientists have found dozens of planets about the same size as Eris and Pluto. I think they should just be Dwarf planets.
What are the 4 dwarf planets called?
Pluto, Eris, Ceres, Haumea and Makemake are the dwarf planets found so far. As you can see there are 5 now, not just 4.
What is Pluto Eris and Makemake?
Pluto, Eris, and Makemake are all dwarf planets in our solar system. Pluto was reclassified as a dwarf planet in 2006. Eris is one of the largest known dwarf planets and is located in the outer solar system. Makemake is another dwarf planet beyond Pluto's orbit and was named after a creator deity in the Rapa Nui mythology.
