If Pluto is a planet, then so is Eris, which is more massive than Pluto.
Are there other bodies out there as massive or more massive than Eris? Possibly so.
The IAU made new interpretations on what is a planet:
https://en.wikipedia.org/wiki/IAU_definition_of_planet
I have a nostalgic urge to think of Pluto as a planet, but the science guys have a better argument…
