Planet 9 is Pluto. What they're talking about is 'Planet X', which the Sumerians among others knew about over 3,600 years ago. So instead of losing face, they

Planet 9 is Pluto. What they're talking about is 'Planet X', which the Sumerians among others knew about over 3,600 years ago. So instead of losing face, they claim Pluto isn't a planet, so now they can waffle on about 'Planet 9' when really they mean Nibiru. It's embarrassing.