Planet 9 'stolen' by our Sun

摘要

Scientists in Sweden have said it's highly likely that Planet 9 was stolen from the orbit of another sun by our own almost five billion years ago. Researchers from Lund and Bordeaux University believe that Planet 9 was an exo-planet - a planet that orbits a star outside the solar system. Using a computer model, they have suggested Planet 9 was captured by our young sun and remained undetected until recently.