Considering the fact 90% of Blockland's player base is too young and arrogent to understand a thing about planets, I will take intervention.
Pluto is NOT a planet.
Pluto is a large space object caught in the Sun's gravitational field, Pluto resides in the Kuiper ateroid belt, and the funny this is there are bigger "objects" in the Kuiper belt larger than pluto.
Take UB313 2003 for example, it is in the Kupier belt, orbits the sun, and has a larger diameter. Only problem is it is not a planet, just like Pluto.
Pluto has the volume of about 0.66% Earth's, which infact is the 4th smallest planet of our solar system, Pluto is so small it is considered a "dwarf planet", which is just basically fancy talk for a large asteroid.
It is a scientific FACT that Pluto is not classified as a planet, go Google it.