Host Bill Nye, CEO of the Planetary Society, and astrophysicist Dr. Neil deGrasse Tyson, recipient of the Cosmos Award for Outstanding Public Presentation of Science, speak about the Planetary Society at More to Explore: A Space Celebration with Bill Nye at the Pasadena Civic Auditorium on Saturday, October 24, 2015. The Planetary Society celebrated its 35th year anniversary on October 23.