For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

"The Voyagers have been deep space rock stars since launch, and we want to keep it that way as long as possible!" ...

The term may appear confusing, since the planets cannot actually fully line up in the three-dimensional solar system exactly as they may be seen in pictures; rather, it's our perspective of the ...