Could Modified Gravity Kill Planet Nine?

For eight years, astronomers have hunted for a mysterious “Planet Nine” on the edges of our solar system. Although no one’s ever seen it, they’ve deduced its presence from observations of unusual clustering among asteroids found in the Kuiper Belt, a donut-shaped region of icy objects that is home to Pluto and most of the dwarf planets.

The Planet-Nine proponents argue that anomalies in the orbits of these so-called Kuiper Belt Objects are caused by the gravitational pull of the hidden —supposedly an ice. In much the same way, anomalies in the orbit of Uranus led to the .