Planetary geologist Ellen Stofan has just become Director of the most popular museum in the United States.  The NASM protects and shares the greatest collection of space and aviation treasures on Earth. Mat Kaplan talks with the former NASA Chief Scientist about her new job and how the museum serves to inspire and inform millions each year.  Senior editor Emily Lakdawalla prepares us for an exciting encounter between Japan’s Hayabusa 2 spacecraft and asteroid Ryugu.  Harry Potter fans, rejoice!  Bruce Betts corrects his correction of an astronomical observation by Harry and his classmates. We also offer another signed copy of Chasing New Horizons: Inside the Epic First Mission to Pluto. Learn more about this week’s topics and see images here:  http://www.planetary.org/multimedia/planetary-radio/show/2018/0530-ellen-stofan-nasm.html