New Horizons: NASA's Pluto-Kuiper Belt Mission
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Science Overview
Everything About Pluto, Charon and the Kuiper Belt
 The Basics
 • Pluto's Orbit
 • Discovery of Pluto
 • Discovery of Charon
 • What's in the Names?
 • Pluto & Charon: Family Album
 • What Is a Binary Planet?
 • Making Maps
 • Surface Composition
 • Pluto's Atmosphere
 • Colossal Cousin to a Comet?
 • The Inside Story
 • Is Triton Pluto's Twin?

 • The Kuiper Belt
 • Comparative Planetology
 • Is Pluto a Planet?
 • Phases & Seasons
Data Collection
Science Operations Center
Science FAQs
Glossary

 


   
What's In the Names?
How Did Pluto (the Planet) Get its Name?

Pluto is named after the mythological god of the underworld who was able to render himself invisible. This excerpt from the book Pluto and Charon (by Alan Stern and Jacqueline Mitton) explains how Pluto was named:


    Something deep-seated in human nature calls on us to name things. It's almost as if a thing isn't real, or whole, until we name it — and so, X had to have a name.

    Suggestions flooded in: "Zeus," "Cronos," "Lowell," "Minerva." Widow Lowell first liked "Zeus," but later suggested "Percival," then "Lowell," and then, finally, "Constance," her own name.

    Dozens of other well-meaning suggestions came pouring in as well. Then there were hundreds, then thousands. But when all was said and done, the moniker for the newly discovered X that the Lowell staff preferred was the one suggested* by 11-year-old Venetia Burney of Oxford, England: Pluto — Pluto, the Greek god of the Underworld; the brother of Jupiter, Neptune, and Juno; and third son of Saturn, who was able, when he wished, to render himself invisible.

    Both the American Astronomical Society and the UK's Royal Astronomical Society adopted Pluto as the official name and P-symbol as the official symbol for the new world. P-symbolwas Percival Lowell's monogram.

   *The French astronomer P. Reynaud had suggested Pluto as the natural mythic name for Lowell's putative Planet X in 1919, but this was not remembered until 1930.

 

Pluto in Classical Mythology?

The Roman god of the underworld, also known as god of the dead, is Pluto. The journey to the underworld leads the dead to Styx, the River of the Dead. Here, they are required to pay a toll for the ferry. Charon, the ferryman collected this toll, which was paid for with a coin buried with the dead. Next, the dead must cross the path of Cerberus, a three-headed dog that only allows the dead to pass by. The final challenge before reaching the underworld was to face the judges of the dead.

Pluto chose the position as ruler of the underworld after he and his brothers conquered and divided their father's rule of the world. In the beginning, Pluto was seen as a cruel god because he ignored the prayers and sacrifices made in his honor. His image softened with time and he was viewed by later cults as a kinder, more gentler god. Pluto eventually took a goddess, Proserpine, maiden of spring. He emerged from the underworld and swept her up in his chariot. Proserpine became goddess of the Dead. Although her fate was in the hands of Zeus and she was only obliged to stay with Pluto for half of the year and return to her mother the other half, hence the change from winter to spring.



For further discussion of Pluto in classical mythology visit:


   • http://www.gwydir.demon.co.uk/jo/roman/pluto.htm

 

 

 
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