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The 11 planets, eight planets and dwarf planets Pluto, Eris and Ceres, under the International Astronomical Union's definition. Planet sizes are shown to scale but their orbital distances are not to scale. Credit: IAU/Martin Kornmesser


Artist rendering of the object now called Eris. This image was released when the object was announced July 29, 2005 by Mike Brown of Caltech as 2003 UB313. It is larger than Pluto. The Sun is in the background. Credit: NASA/JPL/Caltech
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The IAU proposed a new definition for planets that bumped the tally to 12. Pluto's moon Charon was ultimately left out, leaving 11 planets and dwarf planets. See them all!

Montana Girl Wins Planet Mnemonic Contest
By The Associated Press

posted: 27 February 2008
11:09 am ET

GREAT FALLS, Mont. (AP) - A fourth-grader at Riverview Elementary School has won the National Geographic planetary mnemonic contest, developing a handy way to remember the newly assigned 11 planets, including three dwarfs.

National Geographic Children's Books created the contest in response to the recent announcement by the scientific community that there are now 11 recognized planets - Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto and Eris. Ceres, Pluto and Eris are considered dwarf planets.

Ten-year-old Maryn Smith's winning mnemonic is My Very Exciting Magic Carpet Just Sailed Under Nine Palace Elephants.

"When I got the call, my first response was, 'I won?'" Smith said in a statement. "I can't believe that next year my teacher will be teaching her new class the order of the planets using my mnemonic!"

Smith's mnemonic will be published in astronomer David Aguilar's next National Geographic book, "11 Planets: A New View of the Solar System.'' It also will be recorded into a song by Grammy-nominated singer and songwriter Lisa Loeb. Both are scheduled to be released in March.

SPACE.com Staff contributed to this report.

 

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