Pluto’s status as a full fledged plane was revoked in 2006. Many people scientists and laypersons alike, grieved Pluto’s demotion. This tiny planet a the far reaches of our solar system has many admirers. Even a beloved Disney cartoon character had been named after it.
But as astronomers discovered other objects about the size of Pluto out in the KUiper belt, beyond Neptune’s orbit, they came to regard Pluto as one of a group of orbiting bodies and not as a solitary planet. The question of whether to classify such objects as planets or to reassign Pluto formed the basis of intense argument among members of the International Astronomical Union (I AU) in 2006. The vote at the IAU convention was not in Pluto’s favor, so 76 years after this orbiting body was discovered and heralded as the ninth planet, it was downgraded to dwarf planet status.