People's profound connection with the Solar System led them to feel a remarkable sense of sympathy for Pluto when it was ...

"Get over it. It's done. Just get over it." The StarTalk Radio host explains why it makes perfect sense to classify Pluto as a dwarf planet. Produced by Kamelia Angelova, Will Wei, & Alana ...

A New Horizons image of Pluto and its moon Charon revealed more surprises about the dwarf planet and its orbiting moon. Click on the hand to see why Pluto and its moon have shaken things up.

When the International Astronomical Union (IAU) demoted Pluto from a planet to a dwarf planet in 2006 ... apart from other celestial objects. But why isn't Pluto considered a planet anymore?