Please add to your list of events: Thursday, October 4, 2007, 4:00 pm Harvard-Smithsonian Center for Astrophysics CfA Colloquium Series Phillips Auditorium, 60 Garden Street, Cambridge "Breaking the Ionospheric Barrier: The Murchison Wide-field Array and the Return of Low Frequency Radio Astronomy" Justin Kasper CfA tea and cookies at 3:30 p.m. http://www.cfa.harvard.edu/events/colloquia