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- Discovered by Clyde Tombaugh
- Discovered on: February 18, 1930
- Was considered a planet for 76 years
- Downgraded to a dwarf planet on August 24, 2006
- Named after the Roman god of the underworld
- Radius: 1,151 kilometers (18% of Earth's)
- Circumference: 7,232 kilometers
- Surface area: 16.65 million square kilometers (3% of Earth's)
- Mass: 1.3x1022 kilograms
- Average distance from the Sun: 5.91 billion kilometers
- Three known moons in its orbitNASA-JPL: Pluto - Facts & Figures
- Tenth-largest known entity that orbits the Sun
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Pluto is a dwarf planet in the Kuiper Belt region of the Solar System. It is the second-largest known dwarf planet next to Eris, and was considered a full-fledged planet until 2006.
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Demotion
In 2006, the International Astronomical Union altered the standards for what makes an object a planet. It established three criteria that the object must meet:- Must orbit the Sun
- Must generate significant enough gravity to force a roughly spherical shape
- Must have cleared other objects out of its immediate area in space
Pluto did not satisfy the third criterion, and was thus downgraded to a dwarf planet.NASA-JPL: Pluto - Overview
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Pluto on Amazon
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Pluto: Urasawa x Tezuka, Volume 3 - $12.99
R to L (Japanese Style)In a distant future where sentient humanoid robots pass for human, someone or some thing is out to destroy the seven great robots of the world. Europol’s ...Amazon
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Pluto Little Brother T-shirt, 6-12M - $28.00
Little Brother T-shirt from Pluto is the perfect gift from a new baby brother to a big sister or brother. Made from the softest washed cotton, finely ribbed, it has raised letteri...Amazon
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Woodstock Percussion DCB27 Pluto Chime, Bronze - $28.00
27" Length, Pluto Wind Chime, Anodized Aluminum Tubes With Bronze Finish, Ash Wood.Amazon
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Breakfast on Pluto - $14.94
Set in the 1970s amidst the british-irish conflicts this follows the journey of self-discovery of a young man who realizes at a young age that he is different. Studio: Sony Pictur...Amazon
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The Pluto Files - $23.95
<strong>The New York Times best-selling irrational love affair with Pluto, <p>In August 2006, the International Astronomical ...Amazon
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Pluto Questions
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Is Pluto an asteroid or comet that fell into orbit around the sun? 1 AnswerPluto is considered to be an asteroid within the Kuiper belt itself more at http://istp.gsfc.nasa.gov/stargaze/Skuiper.htm read more -
Is Pluto still considered a planet or not? 3 AnswersPluto is not officially a planet according to the International Astronomical Union (IAU) as of last year. Why? For one, it's too small. I think there are a half... read more -
How were Uranus, Neptune, and Pluto discovered by scientist? 1 AnswerIn short: Uranus was discovered by sight, Neptune and Pluto by deductive reasoning. Let´s see it how all was done: http://www.universetoday.com/wp-content/uplo... read more
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Is Pluto still a planet? Who decides - astronomers or politicians? Is Illinois on our planet? 2 AnswersThis is the kind of thing they do in the Illinois Senate? Really? No wonder Obama voted "present" all those times - a meaningless vote on a meaningless questi... read more
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On Twitter Powered by Twitter
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RT @DY_CITYSTAR Who tryn to build a spaceship to pluto with me
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RT @NewHorizons2015: What if we flew another New Horizons to Centaurs & big Pluto-class KBOs? What if we even went there via Uranus? How ...
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@fyrfli @gordonswaby know what else I've been listening to lately and loving? Duppy or gunman (Pluto Shervington)
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RT: @rachellegoguen: I wrote about three of the best comics of the year (Pluto, Power Girl and Daredevil) here: http://tinyurl.com/ygkkkzt
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RT @rachellegoguen: I wrote about three of the best comics of the year (Pluto, Power Girl and Daredevil) in this article http://tinyurl. ...
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