Video: Scott Sheppard's Planet X Capital Science Evening Lecture
DTM's Scott Sheppard presented a talk titled, "Beyond Pluto: The Hunt for a Massive Planet X," at the Carnegie Institution for Science headquarters in Washington, D.C., on Thursday, February 21.
In December 2018, Sheppard announced the most-distant object ever observed in our Solar System. His team's work has shown that the farthest-out-there objects—beyond the Kuiper Belt and the influence of the known major planets—are strangely grouped together in space. This suggests the existence of a yet-unobserved planet, sometimes called Planet X or Planet 9. More massive than the Earth, this mysterious planet could be shaping the current orbits of these extremely distant objects.
Watch the lecture: