pluto... no more a planet??

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recently scientists have said that pluto donot satisfies two conditions of being a planet but is it really easy to change the ideas of people about te member of solar system. even today children are taught that solar systyem has nine member in it. if pluto is not considered as planetg ten why children are still taught that it is smallest planet. how the total idea of people about solarsystem to be changed?? how it is totally neglected as a heavenly body only