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The 9th planet to be discovered was Pluto in 1930. However, by 2006 there were so many Pluto-sized objects being found that a reclassification was made. Pluto was classified as a "dwarf planet" along with the asteroid Ceres and the planetoids Haumea, Makemake, and Eris.
There is no 9th planet. It used to be Pluto, but that's classified as a dwarf planet now.
Pluto

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Q: What was the believed to be the ninth planet from 1930 to 2006?
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What planet was named in 1930?

Pluto was discovered in 1930 and dubbed the ninth planet. It was known as the ninth planet up until 2006, when it was reclassified as a dwarf planet. Now there are only eight officially recognised planets in our solar system, with an additional five dwarf planets and several more dwarf planet candidates.


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This used to be called a planet until recently?

Pluto. From its discovery in 1930 until 2006, it was considered the ninth planet. It was reclassified as a Dwarf planet in August 2006.


What did Pluto do?

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This used to be called a planet but not now?

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Which planet was discovered in the 20th centry?

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What number planet away from the sun is Pluto?

I do not really understand what you are asking but The Dwarf Planet Pluto is the ninth planet from the sun, it is believed that it is not even a planet anymore. Thank you for using wikianswers.com.


How long was Pluto considered one of the major planets?

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Pluto?

A dwarf planet located in the Kuiper Belt, a ring of icy objects beyond Neptune. It was discovered in 1930 and was considered the ninth planet in our solar system until 2006 when it was reclassified as a dwarf planet. Pluto is the largest known trans-Neptunian object by volume.


When was Pluto considered a major planet?

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