Why is Pluto Not a planet?
Simple! Because now AumSum is officially a planet!
Oh AumSum!
According to the new definition of a planet, a planet is a celestial body which is in orbit around the Sun.
It is spherical in shape and it has cleared the neighborhood around its orbit.
Now, Pluto is in orbit around the Sun and it is spherical in shape.
But unfortunately, Pluto has not been able to clear its neighborhood, as in, it has not been able to remove the asteroids and dwarf planets present around its orbit.
Hence, it is not called a planet anymore!