The statement is true. Lots of ice balls, ice small planets and planetoids have been discovered in the outer Solar System beyond Pluto. This has lead to confusion in the classification of the planets, and what is and what is not a planet, so Pluto was first taken out from the planets order, than brought back, and there's a big debate and there's not really an opinion that prevails by much over the other, on weather Pluto should be or not a planet, and the same goes about the other planets and planetoids, like Charon and Xena for example.