In an exciting breakthrough in planetary science, a recent study has increased the likelihood of Planet Nine’s existence by up to 40%. This planet, also referred to as Planet X, has remained an ...

Planet X has a long and storied history of non-existence. For about 130 years, astronomers have debated the existence of an additional planet or planets to explain discrepancies in the orbits of ...

Planet X, or Nibiru, is on a crash course with Earth, doomsayers believe — prophecies draw new focus with ‘Planet Nine’ discovery ...

While searching for the mysterious Planet X that some astronomers believe lurks on the edge of our solar system, researchers instead found an extremely distant object they dubbed “the Goblin.” ...

An artist's concept of Planet 9, sometimes referred to as Planet X. Planet 9 is a hypothesized ninth planet in our solar system. It is not about to kill us all.

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

And if Planet X — also sometimes called Planet Nine — exists, it’s way out there; it’s somewhere between 200 and 1,200 times the distance from the Sun to Earth.

If Planet X is out there, it’s really, really far away. Brown and Batygin’s educated guess as to where Planet X might be is based on the crooked orbits of 6 very distant objects.

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.

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If found, this gassy, icy beast some 155 billion miles away from the Sun ...

If there is a Planet X out there, it will necessitate a wholesale rewriting of some key chapters of the solar system's history. On the trail of hidden worlds.

Planet X, also known as Nibiru, should have collided with Earth on several occasions based on conspiracy theorist claims and YouTube videos and websites that feed into the doomsday theory.