Neil deGrasse Tyson :-)

Neil deGrasse Tyson (Letters From an Astrophysicist) tells Justin the real story of why Pluto is no longer a planet. Then, Neil reminisces about the time he told James Cameron about a huge astronomical error in Titanic. Support us by supporting our sponsors! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.