It has to do with intragalactic nomenclature and politics.
The issue of a clear definition for "planet" came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body larger than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is large enough for its own gravity to make it round, and has "cleared its neighbourhood" of smaller objects. Under this new definition, Pluto, along with the other trans-Neptunian objects, does not qualify as a planet. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright
I wanna see some Plutonian Smack-Down on this. We just cant let Pluto go down the tubes as a planet just because some douche bags want to have their systematics rule the day.
UP, is with which, this shall not be PUT.