In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its status as the ninth planet in our Solar System. From that day forward ...

Astronomers recently detected new features in its high-altitude haze - revealing more than previously known. Once thought to be a frozen, featureless world, Pluto was found to have icy plains and ...

Far beyond the eight familiar planets in our solar system, countless bizarre and extreme worlds await discovery — and some ...