A mysterious planet Mars-sized may be hiding at the edge of our solar system

  A new mysterious planet, an unseen mass object, may lurk in the outer reaches of our solar system, according to new research on the orbits of minor planets published in the Astronomical Journal. This More...

Planet Nine could spell doom for solar system, Study

The solar system could be thrown into disaster when the sun dies if the mysterious ‘Planet Nine’ exists, according to research from the University of Warwick. Dr Dimitri Veras in the Department of Physics More...

Curious tilt of the sun traced to undiscovered planet Nine

  Planet Nine (X)—the undiscovered planet at the edge of the solar system that was predicted by the work of California Institute of Technology- Caltech’s Konstantin Batygin and Mike Brown in January More...