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Pluto

en.wikipedia.org/wiki/Pluto

Once Pluto was found, its faintness and lack of a resolvable disc cast doubt on the idea that it was Lowell's Planet X.

Why Pluto is No Longer a Planet - Universe Today

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

In my opinion, any definition of planet that isn't universal or that excludes gas ..... It's not to say Pluto isn't a planet anymore, it's just due to new scientific data, the ...

Why is Pluto no longer a planet? - BBC News - BBC.com

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

Jul 13, 2015 ... In 2006, Pluto was demoted from planet status. ... But it will bring into clear focus once more what is, and what isn't, meant by the term "planet".

www.ask.com/youtube?q=Why Isn't Pluto a Planet Anymore?&v=APPGb-4bp4Q
Jul 13, 2012 ... NASA scientist explains why Pluto got... well... plutoed. Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, ...
www.ask.com/youtube?q=Why Isn't Pluto a Planet Anymore?&v=FqX2YdnwtRc
Feb 12, 2007 ... Dr. Robert Hurt explains why Pluto got... well... plutoed.

Why Isn't Pluto a Planet Anymore? - NASA Spitzer Space Telescope

www.spitzer.caltech.edu/video-audio/136-ask2006-003-Why-Isn-t-Pluto-a-Planet-Anymore-

Feb 12, 2007 ... Dr. Robert Hurt explains why Pluto got... well... plutoed.

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

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

The reason why there was debate over whether Pluto constitutes a planet or not is due to ... Pluto is not considered a planet anymore because The International ...

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 ... The simplest reason that Pluto is not a planet is that planet experts say so, .... Nor would it in being the first discovered, which it also isn't. ..... doesn't recognize the category anymore — even Pluto was belatedly issued one).

"Why Isn't Pluto a Planet Anymore?" - Dr. Fred Bortz

www.fredbortz.com/askplanets.htm

Homepage for children's author Fred Bortz including author school visit information and science questions.

Answer
Pluto, though originally classified as a planet, was reclassified in 2006 as a "dwarf planet".
More Info

What Is Pluto? | NASA

www.nasa.gov

Most inner moons in the solar system keep one face pointed toward their central planet; this animation shows that certainly isn't the case with the small moons of ...

Why Is Pluto No Longer a Planet? | Wonderopolis

wonderopolis.org

American astronomer Clyde Tombaugh discovered Pluto in 1930. From 1930 until 2006, Pluto sat comfortably beyond Neptune as the ninth planet in our solar  ...

Curiosities: Why isn't Pluto considered a planet anymore? | Just Ask ...

host.madison.com

Nov 14, 2010 ... Although astronomers recognized nine planets, "Pluto had always been suspect because we knew it was small and followed a noncircular orbit ...