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Pluto

en.wikipedia.org/wiki/Pluto

Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of ... The IAU has not formalized a definition for binary dwarf planets, and Charon is officially classifi...

Why Pluto is No Longer a Planet - Universe Today

www.universetoday.com/13573/why-pluto-is-no-longer-a-planet/

Jan 5, 2012 ... 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 ...

Why is Pluto no longer a planet? - BBC News

www.bbc.com/news/science-environment-33462184

Jul 13, 2015 ... In 2006, Pluto was demoted from planet status. Why was it removed from the planet club?

What Is Pluto? | NASA

www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-pluto-k4.html

This group decided that Pluto was not really a planet because of its size and location in space. ..... Large debris could be satellites that are no longer working.

www.ask.com/youtube?q=Why Is Pluto No Longer a Planet?&v=pTZMgoh663I
Apr 15, 2014 ... Then why isn't Eris a planet because it's bigger than Pluto ... How many of you genuinly cared about Pluto before it was no longer a planet?

Why is Pluto not a planet? – Greg Laden's Blog - ScienceBlogs

scienceblogs.com/gregladen/2015/07/13/why-is-pluto-not-a-planet/

Jul 13, 2015 ... Short answer: Pluto has only two of the three necessary characteristics to be called a planet. Pluto has not cleared its neighborhood, or orbit.

Pluto Not a Planet, Astronomers Rule - National Geographic News

news.nationalgeographic.com/news/2006/08/060824-pluto-planet.html

Aug 24, 2006 ... 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."

Why is Pluto no longer considered a planet? | HowStuffWorks

science.howstuffworks.com/pluto-planet.htm

Aug 24, 2006 ... Pluto, shown as the outermost ring in both illustrations, has the most irregular orbit of all of the objects previously considered planets.

Why isn't Pluto a planet anymore? - UCSB Science Line - University ...

scienceline.ucsb.edu/getkey.php?key=1504

Pluto is not considered a planet anymore because The International ... Planets include the eight traditional planets from Mercury to Neptune, but no longer Pluto.

Pluto a Planet Again? It May Happen This Year - The Crux

blogs.discovermagazine.com/crux/2015/02/25/pluto-ceres-planet-again/

Feb 25, 2015 ... Yet Pluto's official planetary status was snatched away. ... belt were discovered and Ceres no longer seemed to stand out as far from the crowd.

Answer
Pluto does not meet all three criteria that now define a planet. A planet must orbit around the Sun, have sufficient mass to maintain a nearly round shape, and it must have cleared the neighborhood around its orbit.
Pluto has not cleared the neighboorhood around its orbit. It has been reclassified as a "dwarf planet". More >>
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Why Is Pluto No Longer a Planet? | Wonderopolis

wonderopolis.org

The truth is, nothing about Pluto changed, but the definition of a planet did. Once these changes became official, Pluto no longer fit the definition of a planet.

Why is Pluto no longer a planet? (Everyday Mysteries: Fun Science ...

www.loc.gov

The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to ...

Why Is Pluto No Longer A Planet? We Explain : Culture : Tech Times

www.techtimes.com

Apr 22, 2015 ... ... from planet to dwarf planet, scientists had their reasons for changing Pluto's classification. Here's why Pluto is no longer considered a planet.