Pluto not a planet! This statement, made by Neil deGrasse Tyson, Director of the American Museum of Natural History's Hayden Planetarium, caused a furor with elementary students across the country. After 10 years, Tyson, travels across...

If Neptune didn't catch Triton we might have another Dwarf Planet in our Solar system -- maybe even another Planet or double system. We show how this could have happened. [2:06]

Dwarf planet 2012 VP-113 takes approximately 4,000 years to orbit the sun once. [11 mins. 55 secs.]

A video reviewing the debate of whether Pluto should be classified as a planet or a dwarf planet. [1:31]