Evidence suggests that a ninth large planet might be lurking well beyond Pluto. Discussed here by Professor Mike Merrifield, an astronomer at the University of Nottingham. Read the paper about it: http://bit.ly/planet_nine Deep Sky Videos: https://www.youtube.com/DeepSkyVideos Objectivity: https://www.youtube.com/c/objectivityvideos Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9