Solar panels are next to useless in the outer solar system, so NASA’s Voyager probes rely on nuclear batteries—technology ...

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

Researchers are still not sure how old the moon is. However, there is now growing evidence that it is almost as old as our ...

Even the little-understood Oort Cloud, at the outer edges of our solar system beyond view, has a partly spiral structure.

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed ...

Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been ...

A weak magnetic field likely attracted matter inward, contributing to the formation of the outer planetary bodies, from ...

New research suggests that a binary pair of Kuiper Belt objects, known as the Altjira system, is actually made up of three ...