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

No telescope has basked in the night sky quite like the enormous new Vera Rubin Observatory. Here's what it could reveal ...

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

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

In searching for the elusive Planet Nine, researchers instead turned up a different resident in our cosmic backyard.

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

The Earth and the Moon found out that there is a Ninth planet, and they decided to find it... Welcome to the SpaceBalls ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

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

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

If there were one, that Planet Nine would "nudge the closest part of 2017 OF201's trajectory inward until Neptune flung it out of the solar system." Because 2017 OF201 is there, that could be an ...

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