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The discovery of other similar objects to Pluto in more recent years has meant that astronomers either had to keep adding planets to the list, or we had to redefine what a planet actually was. In 2006, a new definition for a planet was established. It had to be approximately round, it had to orbit the sun and it had to have cleared its neighbourhood of all other objects - so that at that distance from the sun, there were no other sizable bodies. Pluto is not large enough to have done the latter, while all other remaining planets have, so it was downgraded to a dwarf planet. There are now eight planets recognised and five Dawrf planets, of which Pluto is one.

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Q: When did they stop calling Pluto a planet?
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Why do astronomers think that charon is another planet?

They don't. Charon is generally considered a moon of Pluto, however, since Charon and Pluto orbit a center of mass that is outside of Pluto some have suggested calling the Pluto-Charon system a binary or double 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


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!


Did you know Pluto is planet from the Sun?

Pluto is not a planet


Is Pluto big?

no Pluto is the smallest planet in the worl and Pluto is also the outer planet


What planet take the most time to orbit the sun?

Neptune. It would be Pluto, but Pluto is a dwarf planet ( a planet that was a planet, but decided that it wasn't a planet)


Is Pluto a planet or a dog?

Pluto is not a planet, but it is a dog from Mickey Mouse. Pluto, is rather a dwarf planet, because it is not big enough to be a planet.