The Annual Allegheny Observatory Open House is scheduled for Friday evening the 22nd of September. Guests may obtain tickets for the tour by calling the observatory at 412-321-2400 starting at 9:00a.m. Tuesday morning the 1st of August. There is no cost for the tickets but they are in limited supply and go quickly. Amateur Astronomer Association of Pittsburgh members will volunteer for both inside the building and bring telescopes for outside on the front lawn. AAAP Member volunteers need to login for member information to appear.