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Three years ago, the IAU decided to draw up the first scientific definition of the term planet. After days of stormy arguments at its general assembly in Prague, the delegates voted for a definition that excluded Pluto, downgrading it to the new category of dwarf planet.
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www.newscientist.com/article/mg20327181.600-is-pluto-a-...
www.newscientist.com/article/mg20327181.600-is-pluto-a-planet-after-all.html
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Sykes is among those who prefer a simple and inclusive definition of planet status: if an object is big enough for its own gravity to squeeze it into a rounded shape, then call it a planet. That would make a planet of Pluto again, as well as Ceres and a growing number of other bodies (see diagram).
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www.impactlab.com/2009/07/27/is-pluto-a-planet/
www.impactlab.com/2009/07/27/is-pluto-a-planet/
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Planetary Status World astronomers have declared that Pluto is no longer a planet under new guidelines. It is now considered a "dwarf planet". History From its discovery in 1930 until 2006, Pluto was counted as the Solar System's ...
http://wiki.answers.com/Q/Is_Pluto_a_planet
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The story of how Pluto lost its status as a planet. ... Let's find out why Pluto is no longer considered a planet. Pluto was first discovered in 1930 by Clyde W. Tombaugh at the Lowell Observatory in Flagstaff Arizona.
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www.universetoday.com/2008/04/10/why-pluto-is-no-longer...
www.universetoday.com/2008/04/10/why-pluto-is-no-longer-a-planet/
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Pluto is no longer a planet, according to a new official definition. Instead the icy sphere will be considered one of more than 40 "dwarf planets." ... In a move that's already generating controversy and will force textbooks to be rewritten, Pluto will now be dubbed a dwarf planet.
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news.nationalgeographic.com/news/2006/08/060824-pluto-p...
news.nationalgeographic.com/news/2006/08/060824-pluto-planet.html
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Pluto: Planet or Comet? Long considered the ninth planet in our solar system, Pluto has always been a little different: it has an unusual orbit, and is smaller than a number of planetary moons. ... ; Pluto: Planet or Comet?
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news.nationalgeographic.com/news/2001/02/0216_Pluto.htm...
news.nationalgeographic.com/news/2001/02/0216_Pluto.html
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Previous answers are right that there are now three parts of the planet definition. When it was classified as a planet, the Kuiper Belt wasn't well understood and nothing large other than Pluto was found there. with the discovery of other K...
http://answers.yahoo.com/question/index?qid=20081212075...
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Last thursday Pluto regained its status as the ninth planet from the sun when it crossed Neptune's orbit. Recent discoveries of Pluto-like objects in the distant recesses of the Solar System have threatened to strip Pluto of its planetary status altogether. ... But is Pluto really a planet? That's what astronomers...
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science.nasa.gov/newhome/headlines/ast17feb99_1.htm
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Welcome to the main webpage for the Society for the Preservation of Pluto as a Planet! We here at SP3 believe strongly that Pluto's status as a planet should not be in question. For over seventy-five years schoolchildren all over the world have learned that our solar system has nine planets.
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www.plutoisaplanet.org/
www.plutoisaplanet.org/
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