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Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume by a small margin, but is less massive than Eris.
In 1936, Pluto was featured in the picture book Mickey Mouse and Pluto the Pup by Whitman Publishing. Pluto ran his own neighborhood in Disney's Toontown Online until its closedown. It was called the Brrrgh and it was always snowing there except during Halloween.
Pluto holds a key because "they say that what is called Hades has been locked up by Pluto, and that nobody will return back again therefrom." [91] Natale Conti cites Pausanias in noting that keys are an attribute of Pluto as the scepter is of Jove (Greek Zeus) and the trident of Neptune (Poseidon). [92]
When did Pluto stop being a planet, and why? Pluto was always in a tough spot when it came to being a planet. Just 1,477 miles across, it's only one-fifth the diameter of Earth.
Pluto, with its heart-shaped glacier, as captured by the New Horizons spacecraft Credit - JPL/NASA But Pluto has in many ways only grown in astronomers’ estimations. It is now known to be part ...
For 76 years, Pluto was considered our solar system's ninth planet — so, what caused it to lose its status?
He discovered Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt. At the time of discovery, Pluto was considered the ninth planet, but it was reclassified as a dwarf planet in 2006. Tombaugh also discovered many asteroids, and called for the serious scientific research of unidentified flying ...
For 76 years, Pluto was considered out solar system's ninth planet. So what caused it to lose its planetary status? Find out on this episode of "Space, Down to Earth"!