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 ...

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

Astronomers have discovered that our solar system traveled through a dense, star-forming region near Orion about 14 million ...

Our grade school understanding of the Solar System may not take into account the constant discoveries being made in our ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long ...