"Why Isn't Poor Old Pluto a Planet Anymore?"

"Why Isn't Poor Old Pluto a Planet Anymore?"," Then in 1930, the Lowell Observatory in Flagstaff, Arizona declared it as a planet. Pluto was now a famous planet, recognisable to school-children - but what a strange planet it was - it was tiny, only coming in at one hundredth the size of earth and is primarily constituted of nitrogen ice - so it is a great chunk of ice, floating out there on its own. It's orbit of the sun is equally bizarre, unlike every other planet, it does not orbit the sun like all the other planets - circularly but rather elliptically. The Kuiper belt was discovered in 1992 - similar to an asteroid belt but constituted by frozen ices such as methane, ammonia and water. So on 24 August, 2006 the International Astronomical Union defined the term 'planet' for the first time and surprise, surprise Pluto didn't make the grade. WHAT'S UP