Planet 9 sits at the edge of scientific imagination, promising either an epic expansion of the Solar System or a lesson in ...

The search has turned into a slow‑burn drama at the edge of astronomy, where statistical hints, disputed alignments and new telescopes collide. The numbers suggest a hidden planet, the images so far ...

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...