New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

There are currently no other explanations for the effects that we see, nor for the myriad other P9-induced effects we see on ...

Discover the mystery of Planet Nine, the elusive celestial body beyond Neptune. Explore the latest astronomical evidence and theories as scientists inch closer to finding this potential ninth planet ...

The idea of Planet Nine emerged in 2016 when Caltech astronomers Konstantin Batygin and Mike Brown presented a mathematical model explaining the unusual orbits of several trans-Neptunian objects ...

In October 2017, NASA released a statement saying that Planet Nine may be 20 times further from the Sun than Neptune is, going so far as to say "it is now harder to imagine our solar system ...

Planet Nine is out there, and astronomers are determined to find it, according to a new statement from NASA. In fact, mounting evidence suggests it's hard to imagine our solar system without the ...

If Planet 9 is real, this observatory has around a 70 to 80 percent chance of finding it, he estimates, adding that it's not a sure thing because there are so many uncertainties.

Planet 9 and the Weird KBO Orbits The idea of a ninth planet existing at the edge of the solar system, far beyond Neptune, was put forward in 2014.

“Planet Nine” could explain the seemingly puzzling orbits traced by two of the distant worlds, known as Sedna and 2012 VP113 (which has been nicknamed “Planet Biden” in homage to a ...