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Dwarf Planet Pluto
Dwarf Planets

Is Pluto considered a planet?

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2017-09-07 04:09:59
2017-09-07 04:09:59

Pluto was considered a planet when it was discovered in 1930.

However, as technology increased it became apparent that there were several other bodies in the same area as Pluto - called the Kuyper Belt - including one later named Eris that was slightly larger than Pluto.

Now the IAU had a dilemma, should Eris be a planet or not. If so, what definition should be applied to an orbiting body to be a planet. In 2006 they came up with a definition that would prevent a rapidly changing number of bodies from being defined as planets. [See related question]

Pluto did not ft the definition, so it was now classified as a dwarf planet, along with other objects even farther from the Sun.

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Pluto is considered to be a dwarf planet.


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