It’s not to say Pluto isn’t a planet anymore, it’s just due to new scientific data, the time has come to re-define and categorize what we’ve learned. Pluto is a different TYPE of Planet. We now have EXO-planets and Hot Jupiters, it was bound to happen eventually. read more
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered. Pluto was discovered by Clyde Tombaugh in 1930 and was originally considered to be the ninth planet from the Sun. read more