NOTE CHANGE IN SPEAKER/TITLE ASTROPHYSICS COLLOQUIUM Tuesday, November 2, 2004 4:00 PM Marlar Lounge, Room 37-252 MIT Center for Space Research, 70 Vassar St, Cambridge, MA Refreshments are served at 3:45 PM. Prof. Charles Alcock Harvard-Smithsonian Center for AstrophysicsFishing in the Dark: Searching for Extremely Faint Objects in the Solar System