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IAU decided this because it shrinks every 10 seconds

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Q: Why did IAU decide that Pluto was not a major planet?
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When did the IAU agree that Pluto was a dwarf planet?

In 2006 the IAU agreed that Pluto was a dwarf planet. Although, many people were against the idea of identifying Pluto as a dwarf planet.


Do all astronomers think Pluto planet?

No. Most follow the new IAU definition of a planet which excludes Pluto.


What happened to the planet Pluto?

The IAU arrived at a new definition for "planet" which left Pluto out in the cold. It is now designated as a "Dwarf Planet".


What changed about Pluto in 2006?

In 2006, pluto's classification was changed to "dwarf planet". This removed it as one of the nine planets in our solar system. It was done so by the IAU (international astronomical union). The main reason for this is due to the orbital path of Pluto as it crosses Neptune's and thus does not fit the IAU's definition of a "planet".


What is the smallest planet in our solar system.?

According to those who do not accept the IAU's judgement on such matters - and no one is required to - Pluto. While Pluto was declared by the IAU to no longer be a planet, many disagreed. They had - and have - that right.


What is the Smallest planet in the solar system.?

According to those who do not accept the IAU's judgement on such matters - and no one is required to - Pluto. While Pluto was declared by the IAU to no longer be a planet, many disagreed. They had - and have - that right.


When was Pluto reconized as a dwarf planet?

Pluto was categorized as a dwarf planet on August 24, 2006, when the IAU defined what a "planet" is in such a way as to no longer include Pluto. Before then, and since 1930, Pluto was considered a planet.


What is the smallest outer planet in our Solar System?

According to those who do not accept the IAU's judgement on such matters - and no one is required to - Pluto. While Pluto was declared by the IAU to no longer be a planet, many disagreed. They had - and have - that right.


Is Pluto the only planet that's not a planet anymore?

Yes. The planet was reclassified as a "dwarf planet" by the IAU in 2006.


Pluto is the what planet from the sun?

Pluto used to be the ninth planet, but it was re-classified as a Dwarf Planet on August 24th 2006 by the International Astronomical Union (IAU).


When was Pluto the first dwarf planet?

Pluto was re-classified as a Dwarf Planet on August 24th 2006 by the International Astronomical Union (IAU).


Who decided about Pluto's status as a ' Dwarf Planet'?

The International Astronomical Union (IAU).