For eight years, astronomers have been searching for the elusive “Planet Nine” lurking at the fringes of our solar system. The theory posits that the odd clustering of asteroids in the Kuiper Belt is due to the gravitational pull of this unseen ice giant, potentially ten times more massive than Earth. However, a controversial theory called Modified Newtonian Dynamics (MOND) proposes an alternative explanation. Researchers argue that MOND can also rationalize the irregular orbits of Kuiper Belt Objects by pointing to the gravitational influence of the dense core of the Milky Way. The debate between MOND and dark matter theories continues while further observations may shed light on the mysterious anomalies in the Kuiper Belt.
https://nautil.us/could-modified-gravity-kill-planet-nine-521271/