Planet Pluto has been found by space scientists since 1930, exactly 75 years of cross. Pluto's discovery itself is considered to be the smallest planet among the nine solar system clusters that have been found. Small size of Pluto itself revealed by International Astronomical Union
(IAU), judged not to be a planet. Thus the IAU defines the planet must have three criteria such as the size of the planet must be greater in order for greater gravity to get the balance. The planet must have an orbit that has no obstructions in the orbit and the planet must orbit the sun.
Unfortunately from that assessment Pluto can not be called a planet because it does not meet one of the three criteria that IAU discloses.
*Yet many scientists disagree with the IAU classification. NASA scientist Alan Stern himself revealed that Pluto is a planet because it has ang icebergs, nitrogen glaciers, blue skies, and clouds.
Stren and Grinspoon themselves do not agree that the IAU's own criteria are false and there are many mistakes. Both assume what the IAU reveals then indicate that the earth is not a planet for the first 500 years of history because the Earth is known to orbit between a bunch of rubble at that time, and also that if you take Earth today and move it elsewhere, say to the asteroid belt, it will stop being a planet.
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