NASA’s newly launched IMAP mission is set to tell us more about the boundary between our Solar System and interstellar space ...

Scientists have discovered a solar system with at least six planets moving around the sun together and hope that it could teach us about the formation of our own solar system. Astronomers have found a ...

Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

One lesson astronomers have learned from the avalanche of new-planet discoveries over the past decade and a half is that all solar systems are by no means created equal. One has five Neptune-size ...