This week the shows include: Oct 06: Encore: Looking for a reason. Why Astronomy? by Richard Saunders; Oct 07: What's up in Planetary Exploration in October 2011 by Emily Lakdawalla; Oct 08: Magnification by Telescope Man; Oct 09: Encore: Stars That Fell Like Rain by John Johnson; Oct 10: Critical Density by Steve Nerlich; Oct 11: Technology Boosts Astronomy Education and Outreach by The 365 Days of Astronomy Podcast 2011; Oct 12: The Discovery of the Accelerating Universe by Rob Knop.