A planetary mnemonic refers to the phrase used to remember planets and dwarf planets of the Solar System, in order of words relating to an increase in the body's sidereal period. One simple visual mnemonic is to hold both hands side by side with fingers spread and thumb in the same direction, with the radius of one hand representing the terrestrial planet, and the other a giant gas hand. The first thumb represents the Sun and the asteroid belt, including Ceres, and the second thumb symbolizes the asteroid belt and trans-Neptunus objects, including Pluto.
Video Planetary mnemonic
Nine planets
An English-speaking mnemonic that is currently in 1950 is "Very Easy Man Makes Jugs Serving Useful Needs, Probably" (for Mercury Venus Mars Earth Jupiter Saturn Uranus Neptune Pluto). The structure of this phrase suggests that it may have originated before the invention of Pluto, and can easily be trimmed back to reflect the demotion of Pluto. Another common English mnemonic over the years is "My Mother Is Very Elegant Just Sat On The Nine Pins ". Other mnemonics include "My Highly Energetic Mom Jumps on Skateboard Under the Terrace Nana", "My Very Educated Mother Serves Us Only Noodles" and "Mary's purple eyes make Johnny stay up a lot", just like "Extremely Easy Method I Only Show The Nine Planets "," My Highly Efficient Memory Only Saves The Nine Planets "and" The Very Easy Method I Just Accelerate Naming the Planet ". Another variant that may precede the discovery of Pluto is the "Mary's purple eye makes Johnny stay up, contemplate" and that, too, can be trimmed back. But others are "Many Volcanoes Start Mulberry Ditches Under Normal Pressure" . However, many of these mnemonics were made obsolete by the 2006 planetary definition, which reclassified Pluto (as well as Ceres and Eris) as dwarf planets. Maps Planetary mnemonic
Eight planets
When Pluto is lowered to a dwarf planet, mnemonics can no longer enter the final "P". The first important suggestion came from Kyle Sullivan from Lumberton, Mississippi, USA, whose mnemonics were published in the January 2007 issue of Astronomy: "The Monster of Satan's Monster I'm Just Afraid of Us". In August 2006, for eight planets recognized under the new definition, Phyllis Lugger, professor of astronomy at Indiana University suggested the following modifications to the common mnemonic for nine planets: My Highly Educated Mother Only Serves Us Nachos . He proposed this mnemonic to Owen Gingerich, Chair of the International Astronomical Society's Planet Committee (IAU) and published a mnemonic at the American Astronomical Society Committee on the Status of Women at Astronomy Bulletin Board on August 25, 2006. It also appeared in Indiana. IU News Room Star Trak University on August 30, 2006. This mnemonic is used by IAU on their website to the public. Another anger at the IAU's decision to "bring down" Pluto composes a sarcastic mnemonic in protest. Schott's Miscellany by Ben Schott including mnemonic, Many Men Are Very Educative, Justify Stealing Unique Ninth . Mike Brown, who found Eris, mentioned hearing Many Highly Educated Men Just Disrupt Nature . One special 9 mnemonic planet, "My very easy memory jell seems to be useful as a naming planet", easily changeable after the demotion occurs, into 8 mnemonic planets, "My memory is so easy the jingle seems to be useless now". A slightly crooked version is "Mary's Explanation" Makes Joseph the Suspect of a Neighbor on the Top ". And probably the simplest: "My Very Easy Method: Only SUN".
Eleven planets and dwarf planets
In 2007, the National Geographic Society sponsored the race for the new Mnemonic MVEMCJSUNPE, combining eleven known planets and dwarf planets, including the recently unloaded Eris, Ceres, and Pluto. On February 22, 2008, My Exciting Magic Carpet Just Sailing Under the Nine Elephant Castles, created by Maryn Smith, 10 years from Great Falls, Montana, was announced as the winner. The sentence is featured in the song 11 Planet by singer and Grammy nominated singer Lisa Loeb and in the book 11 Planet: New Views of the Solar System by David Aguilar (ISBN: 978-1426302367).
Thirteen dwarf planets and planets
Since the National Geographic competition, two additional bodies have been defined as dwarf planets, Makemake and Haumea, respectively on July 11 and September 17, 2008. A New York Times 2015 article suggests several mnemonics including, "My Highly Educated Mother Can Not Serve Us Nine pizza - Hundreds of Eats! "
A longer mnemonic will be needed in the future, if more dwarf planets may be acknowledged as such by the IAU. However, at some point the enthusiasm for new mnemonics will be reduced because the number of dwarf planets exceeds the number of people who want to learn. (It is estimated that there may be 200 dwarf planets.)
References
Source of the article : Wikipedia
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