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 ...

With a sun more than 4.5 billion years old, our solar system ... This video animation shows an artist's view of the PDS 70 system transition to real images of the two planets and ...