Astronomers have discovered icy rocks in the outer solar system that seem to defy the laws of physics, suggesting the potential existence of a hidden ninth planet. In this video, the lead researchers ...

For decades, astronomers have suspected that a massive, unseen planet may be shaping the strange orbits of distant objects beyond Neptune. Recent simulations suggest the odds of these gravitational ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

Astronomers believe there is a Planet Nine in the outer solar system beyond Neptune. A team led by Amos Chen from the National Tsing Hua University, is searching for Planet Nine’s heat signature. When ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth. When you purchase through links on our site, we may earn an affiliate ...

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar... If Planet Nine is out there, this telescope might ...