New research shows there is at least a 40% chance of the existence of Planet Nine, but scientists are still looking for ...

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

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 ...

Wide-orbit planets are fairly common according to the study, and there's a good chance we have one of our own.

The chance of a planet forming in the outer reaches of the solar system – a hypothetical Planet Nine – could be as high as 40 ...

Discovery of 2017OF201, a large trans-Neptune Object, challenges previous beliefs about the Kuiper Belt and hints at the ...

In an exciting breakthrough in planetary science, a recent study has increased the likelihood of Planet Nine’s existence by ...

A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.