Astronomers are closing in on what looks like a colossal missing piece of the Solar System, a giant planet that appears to ...

Astronomers have noticed something strange happening at the outer edge of our solar system: distant objects are moving in ...

Scientists say studying objects like Ammonite, despite their immense distance, offers valuable insight into the solar ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

Astronomers have spent the past decade cataloguing thousands of planets beyond the solar system, many of them falling into a ...

A rare discovery beyond Neptune is forcing scientists to rethink early solar system dynamics and the forces that shaped ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...