The Clay Center Observatory, on the campus of Dexter Southfield School (20 Newton Street in Brookline; 5th floor), will hold Public Telescope Nights 8PM to 9PM on these Tuesdays:  July 11, 18, 25 and August 1 and 8.  Register in advance.  Events are canceled if weather is rainy or overcast:  Call 617-454-2795 one hour before the event for a recorded message.  The Clay Center offers a range of Outreach Programs for community groups.  Check the Center’s calendar for future events.