March 28th: What if the Moon did not exist? by Patrick McQuillan | Mar 28, 2009 | Incorporated Research Institutions for Seismology (IRIS), Podcast read more
February 13: A scale model of the Earth-Moon system by Bill Hudson | Feb 13, 2009 | Podcast read more
January 5: The Seasons and Solar System Geometry by Slacker Astronomy | Jan 5, 2009 | Slacker Astronomy read more