The Christa McAuliffe Center at Framingham State University opens its planetarium for free public presentations on the third Friday of each month (except April). The show on October 20 will be The Night Sky: Yours to Discover and will include the film Two Small Pieces of Glass: The Amazing Telescope. Space is limited, and pre-registration is strongly recommended. A few seats remain for the 5:30 and 6:30 shows. Arrive on campus 20 minutes early (directions and parking).