Evidence for 'Planet 9' may actually show our theory of gravity is incomplete

https://www.yahoo.com/news/evidence-planet-9-may-actually-210001465.html


"Evidence pointing toward the existence of an undiscovered ninth planet in the solar system may actually indicate our ideas of gravity are incorrect.

Such is the conclusion of two scientists who studied the effect the wider Milky Way galaxy would have on objects in the outer edges of the solar system if gravity is described by a theory known as Modified Newtonian Dynamics (MOND)."