2. Clay Center Observatory: in Brookline, MA on the campus of Dexter/Southfield schools (where JFK went to school). This Saturday from three until ten p.m. the center is celebrating Astronomy Day, and every Tuesday night in the spring and fall (weather-permitting) the observatory has free public telescope viewings. The center has an LED-lit constellation court, plus a moon court and a sun court to check out. Pictures from the center's website here. Short video from our field trip below.