The Clay Center Observatory, on the campus of Dexter Southfield School (20 Newton Street in Brookline; 5th floor), holds Public Telescope Nights on most Tuesdays in the spring and fall, from 8PM to 9PM.  They’ll take a break this week and be back November 29 for a short time before closing for the winter, then back open from March 28 through May 30. 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.