In the sumerians tafleds it is called Nemesis , also there is knowing of a planet that goes it s orbit 36 thousamd years , not long ago a telescope in chile toldabout two opjects that are entering our solarsystem , now that is not in the media , this nine numer planet is 10 times the mass of our earth ,if this planet goes around our sun and goes by earth then god jelp us because that planet have strong gravity hope am wrong