The Christa McAuliffe Center at Framingham State University opens its planetarium for free public presentations on the third Friday of each month (except April), with two one-hour shows:  5:30PM and 6:30PM.  This month, on November 18, the show will be Back to the Moon for Good.  The 5:30PM family-oriented show is sold out, but you can still register for the 6:30PM show for the general public.  For future shows, registration opens two weeks prior to each event via links on this page listing upcoming events.