NASA Solar System Ambassador and Montauk Observatory Astronomer, William Francis Taylor, will present a lively, illustrated talk about the constellations, planets and other celestial objects that are visible in the fall sky over Long Island and how you can identify them.  Afterward, weather permitting, Mr. Taylor will set up a telescope and present a guided tour of the night sky, pointing out the celestial objects he discussed during his talk.   Register for this free event by calling the Library at (631) 749-0042, Ext. 108.  [SL303]