Discovered in 1930, Pluto was long considered our solar system's ninth planet. But after the discovery of similar intriguing worlds deeper in the distant Kuiper Belt, icy Pluto was reclassified as a dwarf planet. Pluto has five known moons, the largest of which is Charon. read more
Pluto is still part of the solar system, but reclassified as a dwarf planet and not one of the (now) eight planets. The problem was that astronomers around the turn of the millennium had started to find a lot of small planet-like thing. read more
Pluto is a complex and mysterious world of mountains, valleys, plains and craters. Discovered in 1930, Pluto was long considered our solar system's ninth planet. But after the discovery of similar intriguing worlds deeper in the distant Kuiper Belt, icy Pluto was reclassified as a dwarf planet. read more