The International Astronomical Union (IAU) yesterday voted out Pluto as the ninth planet in the Solar System. They had established a new set of rules before a celestial body is considered to be a planet:
“A celestial body that is in orbit around the sun, has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a … nearly round shape, and has cleared the neighborhood around its orbit.”
And based on this new definition of a planet, Pluto is not one. It was demoted from Planet status to a Dwarf object.
I guess, they have to re-write all of the science books that tells us that we have nine (09) planets in the Solar System.
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