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Pluto is no longer considered a planet (however it is called a dwarf planet) because it failed to meet the International Astronomical Union's definition of a planet:

must orbit the sun (check)

nearly round in shape (also, check)

has cleared its orbit area of other planets (here's where Pluto fails, as Saturn crosses Pluto's orbit every so many years)

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14y ago

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Related Questions

How come Pluto is not planet?

because pluto is not big enough


Which planet is an outer planet but is more like an inner planet?

The planet that was an outer planet, but was more like an inner planet was Pluto because of its size. The planet Pluto is no longer considered to be a planet.


When it was agreed that Pluto is not a planet?

August 24, 2006 is the date when Pluto was consider no more a planet.


When was Pluto ruled out as planet from the list of planet in the solar system?

In 2006 Pluto was degraded to the status of dwarf planet(there is another dwarf planet, Eris, that is more massive than Pluto).


When Pluto was found which was more popular Pluto the planet or Pluto the dog?

Pluto was founded by ancient Greek astronomers thousands of years ago. So I'll go with Pluto the planet, despite it now being a dwarf planet.


Which planet was gone?

Pluto is not considered a planet any more.


Since Pluto is not a planet any more then what is it?

a dwarf planet


What planet is more massive Pluto or mercury?

Mercury, which is over twenty times the mass of (minor planet) Pluto.


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

Pluto, it is now a dwarf planet or planetoid.


Where does the planet Pluto name come from?

It came from one of the gods.


When Pluto was a planet why was it not always the farthest planet from the sun?

Pluto's orbital is elliptical. Its farthest planet from sun when it lies on two elliptical end. On the other hand Neptune's orbital is circular and become larger then Pluto's orbit when Pluto come in the middle of two elliptical end. For this reason Pluto is not always farthest planet from sun.


What planet is on the left of Pluto?

If by this, you mean the planet next closest to the sun, the answer is Neptune! Of course, Pluto isn't a planet any more. Hope this helps!