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What else can I help you with?
Why does Pluto not anymore considered as planet?
The definition of a planet was changed and it does not meet that definition.
Do all astronomers think Pluto planet?
No. Most follow the new IAU definition of a planet which excludes Pluto.
What happened to the planet Pluto?
The IAU arrived at a new definition for "planet" which left Pluto out in the cold. It is now designated as a "Dwarf Planet".
Is Pluto an planet?
No. The definition of the word "planet" has changed. We now have a new term, "dwarf planet", to describe things like Pluto..
What is the origin of the word plutonium?
It is named after the planet Pluto, which is, itself, named after the roman god of the underworld, Pluto. Pluto is the roman name for the Greek god Hades, which is the underworld itself. Yes, it is named after the planet Pluto, however that is not the 'definition' of the word Plutonium itself. In 1994, the definition of the word Plutonium was given as "the element of the Lord of Hell'. It seems that this 1994 definition has all but disappeared from public view. It makes one wonder why.
Is Pluto still one of the planets of our solar system?
Pluto has not changed in any way. Our definition of a planet has changed. So, Pluto is no longer a planet, it is a minor planet of our solar system.
When did scientists describe Pluto as a dwarf planet?
In 2006 the Astronomical Union defined 'planet' and the definition excluded Pluto. At the same time they created the term dwarf planet into which Pluto fell.
Is Pluto disappearing?
No. Pluto is still very much intact and is not going anywhere soon. However, as of 2006 Pluto is no longer considered to be a planet based on a new formal definition that was developed by the International Astronomical Union.
What definition of planets did Pluto not have?
The much-debated 2006 reclassification of Pluto as a dwarf planet happened because of the newly agreed-upon threefold definition of a planet: it has to be in solar orbit, has to be spherical (or in hydrostatic equilibrium) and has to have cleared its orbit - and it failed on the third count, since Pluto was considered to have only cleared less than a tenth such mass.
Does its size have something to do with the reclassification of Pluto?
No. Pluto is large enough to meet the definition of a planet. It was reclassified because it does not dominate its orbit, but instead shares it with many comets.
Who discovered that the Pluto is to be cancelled as a planet?
No one "discovered" that fact, it was agreed upon by a gathering of planetary scientists. They chose to limit the definition of what a "planet" was. Under the new definition Pluto was excluded.The rules of a planet are:It orbits the SunIt is large enough for gravity to squash it into a sphereIt must have cleared its orbitThis last is the one that Pluto does not comply with. There are many other objects in Pluto's orbital path.
When did we find out that Pluto isn't a planet?
We didn't exactly "find out" that Pluto isn't a planet. In 2005, astronomers discovered several Pluto-like objects orbiting farther out. These discoveries raised the question of what could be considered a planet. At the time, there was no formal definition of what was a planet and what wasn't. After much debate, the International Astronomical Union created a formal definition in 2006. Pluto fell short of the criteria needed.
