A new theory has emerged to explain how Pluto may have captured its largest moon, Charon, billions of years ago through a unique "kiss-and-capture" collision. The process, proposed by researchers, ...

A very rare treat is about to grace Earth's night skies.

A researcher has used advanced models that indicate that the formation of Pluto and Charon may parallel that of the Earth-Moon system. Both systems include a moon that is a large fraction of the size ...

A new study suggests that the origin of Pluto's largest moon was quite different than our own. Here's what you need to know.

On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he looked at Jupiter through his telescope, he saw what he thought were three tiny ...

Throughout January, four planets will line up in the night sky and be simultaneously visible to the naked eye in the Northern ...