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In 2006 the Astronomical Union defined 'planet' and the definition excluded Pluto. At the same time they created the term dwarf planet into which Pluto fell.

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This used to be called a planet but now isn't?

Pluto is a dwarf planet because scientists say Pluto is too small to be a planet anymore. Pluto is a DWARF PLANET.


Do scientists say that Pluto is a dwarf planet?

Yes.


What year did scientists find out that Pluto was a dwarf planet?

2006


What planet are scientist saying is not a planet?

Pluto is the planet that scientist are saying is not a planet. Scientists are not saying any particular planet is not a planet. Simply that Pluto has been reclassified as a dwarf planet.


Why do scientists say Pluto is usually the ninth planet?

No scientists say that. Scientists know that Pluto is a dwarf planet, and not one of the 8 major planets of our solar system.


Do all astronomers think that Pluto is a planet?

No, not all astronomers consider Pluto a planet. Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union, leading to debate among scientists about its classification. Some astronomers argue that Pluto does not meet all the criteria to be considered a full planet.


What did Pluto do?

It became the ninth planet in 1930. But in 2006,scientists agreed that Pluto became a dwarf planet ever since.


What is Pluto the dwarf planet an example of?

Pluto the dwarf planet is an example of of a dwarf planet.


Is Pluto an planet?

No. The definition of the word "planet" has changed. We now have a new term, "dwarf planet", to describe things like Pluto..


How many years have scientists known about Pluto?

The dwarf planet Pluto was discovered in 1930 by Clyde Tombaugh.


What is Pluto's designation?

A dwarf planet, although that designation continues to be disputed by some scientists.


Pluto the dwarf planet?

Pluto, the dwarf planet, is the smallest planet in our solar system. In 2006 scientists confirmed that Pluto was a dwarf planet. They confirmed this because Pluto does not have a clear orbit around the sun. The things that a planet must have in order to be a planet is that it MUST have a clear orbit around a star. FUN FACT: Pluto's moon is almost as big as itself! Pluto is the coldest planet in our solar planet. Pluto is an outer planet.