What Happened to Planet X

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? Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: Support us on Patreon: FOLLOW or SUBSCRIBE to StarTalk: Twitter: Facebook: Instagram: About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetar