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Is Pluto still part of the solar system?

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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

Enjoy Astronomer Marek Kukula's eloquent guide to the Sun, the planets and the outer reaches of the Solar System. Clyde Tombaugh discovers Pluto Now demoted to dwarf planet status, Pluto is still an important world. read more

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Our solar system
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