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The International Astronomical Union defined planet on August 24, 2006 and decided that Pluto did not fit the definition.

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14y ago
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12y ago

24th August 2006

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Q: When did they discover Pluto was not a planet?
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Related questions

What planet did Clyde tombaugh discover?

Pluto, which is now classified as a dwarf planet.


When will scientist discover the planet after Pluto?

It takes a space robot years just to get to a planet, Imagin Pluto, it would take about 50 years to get to pluto. That's why we just use the telescope.


Who has tried discover Pluto?

question: who has tried to discover Pluto Percival Lowell was the one who finally discovered the: dwarf planet; AKA Pluto; AKA planet x. But finally the discovery was made


Which planets were discovered by Clyde Tombaugh?

None. Clyde Tombaugh discovered the body we know as Pluto. This was originally described as a planet but internationally it is now recognized that Pluto is not a planet but a dwarf planet. Therefore Clyde Tombaugh did not actually discover a planet!


What was the the planet that is no longer a planet in your solar system?

Pluto, it is now a dwarf planet or planetoid.


Is Pluto a favorite planet?

Pluto is not a planet its a dwarf planet


What was the last planet discovered during the 20th century?

The last planet to discover during the 20th century was Pluto. But it's a dwarft planet so it should maybe be Neptune.


The closest planet to pluto?

neptuneNeptune is the closest to Pluto. Uranus is the second closest planet to Pluto. Saturn is the third closest planet to Pluto. Jupiter is the forth closest planet to Pluto. Mars is the fifth closest planet to Pluto. Earth is the sixth closest planet to Pluto. Venus is the seventh closest planet to Pluto. Mercury is the most furthest away from Pluto. The Sun and the moon are not considered as planets. The planet Pluto is also not considered as a planet.


Is Pluto a rocky or gas planet?

Pluto is a rocky world. Pluto is now reclassified as a dwarf planet.


What tipe of planet is Pluto?

Pluto is a dwarf planet


What planet change to Pluto?

dwarf planet Pluto


Why did sientists agree that Pluto was not a planet?

Pluto is a planet!