What Happened to Planet X?

Jul 25, 2024 Neil deGrasse Tyson Explains… Where did Planet X go? Neil deGrasse Tyson and comedian Chuck Nice break down the case of Planet X and whether there could be more planets lurking in our solar system.

Learn about the history of discovering planets and why it lead scientists to believe in a Planet X. Discover how a prediction lead to finding Neptune and Pluto. When did the idea of Planet X go away? Is there still a chance that there is an unknown planet orbiting in the darkness of our outer solar system?

@RalphHightower: I’m glad that Neil didn’t use Planet IX since Pluto was demoted from being a planet.