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Pluto, when it was discovered was a planet because it orbited the Sun. However, since then, more and more objects were found that also orbited the Sun. When a larger body than Pluto was found (Eris) it became clear that not all objects could be called a planet.
So a definition was decided [See related question - what is a planet] and Pluto did not fulfil this criteria.
Pluto is still Pluto - it's just it has changed from being a street to an avenue.
What else can I help you with?
Is Pluto gravity smaller or bigger than earth?
Pluto is a small planetoid smaller than the Earth.
What was the the planet that is no longer a planet in your solar system?
Pluto, it is now a dwarf planet or planetoid.
Which planet is the only outer planet that is dense and rocky?
That would be Pluto, but Pluto is no longer considered a planet, only a planetoid.
Is Pluto really a planet what do scientists say?
No it is too small to be a planet so it is a planetoid. From scientist bob Jones
What is the name of Pluto's planet?
Charon. It's more of a satellite than a planet, unless you want to consider Pluto/Charon as a double planet. That's a little awkward, since Pluto has been downgraded to a planetoid.
Which planet is the furtherest from the sun?
Neptune, now. Pluto has been downgraded to a planetoid. There were times that Pluto would be closer to the sun than Neptune, too. So it would depend when you asked.
Is there any planets after Plato?
Plato is not a planet but a philosopher.If you mean Pluto: it is no longer considered a planet, but a "dwarf planet"; something like a large planetoid. A planetoid larger than Pluto has already been discovered - look up information about Eris. It seems reasonable to expect that more such "dwarf planets" will be found in the future.
What in space starts with the letter Q?
IMPROPER NOUNSQuasar (core of a galaxy)Qiasistar (star containing black hole)Quasi-periodic oscillating x-rays (electromagnetic radiation)Quarks (components of matter)PROPER NOUNSQuintilla (planetoid 755)Queteleta (planetoid 1239)Quadea (planetoid 1297)Quetzalcoatl (planetoid 1915)Qinghai (planetoid 2255)Quanzhou (planetoid 3335)Quqinyue (planetoid 3513)Quanxuesen (planetoid 3763)Quaide (planeoid 3876)Quincy (planetoid 4372)Queens (planetoid 5457)Qualytemocrina (planetoid 5865)Qwerty (planetoid 6600)Quercus (planetoid 8643)Querquedula (planetoid 8755)Quintenmatsijs (planetoid 9569)Quesnay (planetoid 9588)Quantz (planetoid 9911)Quaor (planetoid 50000)
Is Pluto the coldest star?
Pluto is not a star. It is a dwarf planet, though planets in our solar system may resemble stars when seen by the naked eye. Pluto is the coldest planetoid in our solar system, though there may be colder planets and dwarf planets in the universe. Pluto is indeed colder than any star.
What plants orbit across another plant orbit?
Using strict modern definitions - none. The orbit of Pluto does cross inside the orbit of Neptune during part of it's journey around the sun, but Pluto is no longer officially a planet - it is a "dwarf planet" or "planetoid".
Is mercury the second littlest planet?
Mercury is the SMALLEST (littlest) PLANET in our solar system, it WAS the SECOND SMALLEST PLANET PRIOR TO Pluto being demoted from a classification of Planet, to a classification of Planetoid.
What are the conditions for being a planet that Pluto lacks?
Pluto spends most of its long orbital journey in the Kuiper Belt, a region beyond Neptune that is full of rocky objects. They are roughly Pluto's size and smaller. A planet must have cleared its orbit of debris. Since Pluto lives in this vast cloud of Kuiper Objects, it has not really done so. From today's perspective it is a planetoid or minor planet, and is also considered a Kuiper object.
