Visit the grounds: year-round, daily, sunrise to sunset. Paine House: guided tours offered seasonally. Allow a minimum of 1 hour, 2 hours if taking Paine House tour.
The Observatory, with the support of volunteers from the North Shore Amateur Astronomy Club, hosts public stargazing every Wednesday night (weather permitting) starting at dusk or 7:30 pm, whichever is later. When special astronomical events of interest occur (total lunar eclipses, etc.) the Obs