A 9th planet in our solar system might be found — and no, it’s not Pluto - Is there another planet out there? Researchers say ...

There has been a lot of back and forth about the existence of a mysterious ninth planet, often referred to as "Planet Nine" ...

Astronomers have been scouring the outer solar system for signs of a hypothetical ninth planet for almost a decade, without success. However, we may finally be on the cusp of finding it, experts say.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Researchers in the US have suggested there is a 40 percent chance a ninth planet could exist in our solar system. Planet Nine ...

Computer simulations show that planets could be flung out of the inner solar system, supporting the possible existence of a ...

Why a mysterious ninth planet might be lurking beyond Pluto. A new computer model suggests a world a little larger than our own Earth hides within the distant Kuiper belt. By Briley Lewis.

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic mystery. Astronomers have cataloged a frozen minor planet called 2017 ...

However, in April 2025, a new study co-authored by scientists in Taiwan, Japan, and Australia claimed to have found a potential candidate for this formerly hidden ninth planet in two datasets that ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...