Beyond the planets’ neat orbits lies a hidden vertical structure of our solar system. From the icy trillions of the Oort ...

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. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

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

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

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 ...

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 ...