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By Richard A. Lovett

By Richard A. Lovett -excerpt

THERE’S something odd going on in the solar system. Our once settled and peaceful home is looking increasingly disturbed and deranged. Bits of it are flying about in eccentric and inexplicable ways. Other bits seemingly shouldn’t be there at all. Meanwhile, the sun is rotating at a rakish angle we are hard-pressed to explain.

Mike Brown, a planetary scientist at the California Institute of Technology in Pasadena, thinks he can explain these strange goings on. There is an unsettling influence in the room: something big and distinctly mobile. Not a poltergeist – but another planet.

It is a controversial claim that, if true, would revolutionise our view of the solar system and go some way to explaining why it looks so peculiar when compared with other solar systems. Brown and other proponents of “Planet Nine” say they now have enough clues to pin down its existence once and for