In a solar system far, far away NASA have discovered a planet which they think 'might be remarkably similar to Earth', though ...

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 ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

Scientists believe our solar system may be hiding a secret world — and it’s not the famous Planet X :eyes: A new study ...

Researchers estimate that the planet has about a 50% chance of being in its star's Hoble zone.

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

We have all been taught in school that planets revolve in the same direction as the Earth, i.e., in the counterclockwise ...

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics but collectively believed to be ...

LONDON — 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 ...