Our live conversation about “Planet 9” and the amazing diversity of our solar system, featuring Konstantin Batygin and Mike Brown of Caltech, Senior Editor Emily Lakdawalla, Bill Nye the Science Guy and Cassini Project Scientist Linda Spilker. We close with a special K9 edition of What’s Up! Related links are here:
http://www.planetary.org/multimedia/planetary-radio/show/2016/0321-all-these-worlds.html
