An curved arrow pointing right. Astronomers have new evidence that seems to confirm Planet 9's existence. Produced by Emmanuel Ocbazghi. Original reporting by Jess Orwig. Follow BI Video ...

The solar system may hold a hidden surprise. Astronomers are investigating the possibility of a mysterious ninth planet, often referred to as Planet Nine. If found, this discovery could change the ...

Astronomers are trying to solve one of the biggest mysteries in space: Is there a hidden ninth planet in our solar system? This planet, called “Planet Nine,” could be far beyond Neptune ...

However, this year a powerful new telescope is coming online that could prove once and for all that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

Now, researchers who believe that a ninth planet is actually hanging around our galactic neighborhood have a theory as to how it got there. The scientists think that the yet unseen ninth planet ...

An curved arrow pointing right. Astronomers say they've discovered a ninth planet 200 times farther from the Sun than Earth. Produced by Emmanuel Ocbazghi. Original Reporting by Jessica Orwig.

9 must-see night sky events to look forward ... Experts debate. Is there a 9th planet out there? We may soon find out. Is there a 9th planet out there? We may soon find out.

She, like her fellow soldiers, do not remember anything about the Ninth Planet - their real memory has been erased, and false memories have been implanted instead.