If Planet Nine Is Out There, It May Not Be Where We Think 15 APRIL 2021 If Planet Nine is out there, a large, mysterious planet lurking at the dark edges of the Solar System, it may not be where we thought it might be. According to astronomers searching for the hypothetical object, new information taken into account could mean that its orbit is significantly more elliptical than most recently predicted.
The hypothetical Planet Nine made a big entrance in 2016, when astronomers Konstantin Batygin and Michael Brown of Caltech published a paper in The Astronomical Journal. In it, they set out their case for an as-yet undiscovered planet in the outer reaches of the Solar System. The evidence, they said, lay in other objects from far beyond the orbit of Neptune.