There's been an ongoing debate on the idea and topic about Pluto's classification as a planet. In 1930, Pluto was discovered 400 billion miles away from the sun by Clyde Tombaugh. "Clyde Tombaugh was an American astronomer who worked for the Lowell observatory in Flagstaff, Arizona" (Wikipedia). When Pluto was discovered it was classified as a planet, it became the 9th planet in the solar system. It wasn't much longer before its classification was in questioned, as a result people started saying that it was not a planet no more, but the classification was now a Kuiper Belt left over. "The Kuiper Belt was discovered by Gerard Kuiper, he was an Astronomer who predicated the existence of a belt of icy objects just beyond the orbit of Neptune"
