Nine Planets Become 12 with Controversial New Definition

The tally of planets in our solar system would jump instantly to a dozen under a highly controversial new definition proposed by the International Astronomical Union (IAU).
Eventually there would be hundreds as more round objects are found beyond Neptune.
The proposal, which sources tell SPACE.com is gaining broad support, tries to plug a big gap in astronomy textbooks, which have never had a definition for the word “planet.” It addresses discoveries of Pluto-sized worlds that have in recent years pitched astronomers into heated debates over terminology.
– The asteroid Ceres, which is round, would be recast as a dwarf planet in the new scheme.
– Pluto would remain a planet and its moon Charon would be reclassified as a planet. Both would be called “plutons,” however, to distinguish them from the eight “classical” planets.
– A far-out Pluto-sized object known as 2003 UB313 would also be called a pluton.
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SPACE.com — Nine Planets Become 12 with Controversial New Definition