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

New research may shine a light on part of outer space's great mysteries: the Oort Cloud. The Oort Cloud is the name given to ...

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it ...

Learn about the Oort cloud, a vast area beyond the inner solar system that is believed to contain icy objects arranged in a ...

The Milky Way's tidal forces may be shaping the Oort Cloud's inner structure into a spiral shape.

Astronomers believe they've discovered a spiral structure inside the Oort cloud that surrounds our solar system.

These embryos, somewhere between small planetesimals and fully formed planets, were abundant ... they could only have formed in the inner solar system. "Angrites are a small group of ancient ...

The inner Oort cloud, between 1,000 and 10,000 AU from the sun, displays a spiral formation with arms that extend 15,000 AU.

New research suggests the Oort Cloud may have a spiral structure like a mini galaxy. Supercomputer models reveal its ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...

The giant cloud of detritus is thought to be the source of strange comets and meteorites flying past Earth such as the ...