A small team of planetary scientists from the California Institute of Technology, Université Côte d'Azur and Southwest Research Institute reports possible new evidence of Planet 9. They have published their paper on the arXiv preprint server,

Since the discovery of Neptune in 1846, scientists have postulated that there is yet another planet, Planet 9, lurking in our solar system. Originally

Something is throwing icy bodies past Neptune, and scientists have an interesting idea about what it might be.

Planet Nine was theorized in 2015 but more and more evidence suggests that the hypothesized planet could be a reality.

For years, astronomers have been on the hunt for a mysterious planet that could be lurking in the farthest reaches of our solar system. Its existence has been proposed based on observations of distant objects beyond Neptune,

Scientists have announced the discovery of compelling evidence suggesting the presence of an undiscovered planet within our solar system.