The Weston Observatory, part of the Department of Geology and Geophysics at Boston College, has just announced the dates and topics for its 2009-2010 Colloquium Series.  All colloquiums are open to the public free-of-charge and will be held at 381 Concord Road in Weston.  Ample parking is available and light refreshments are provided.  Reservations are REQUIRED due to limited seating.  Call 617.552,8300 or visit