The Oil Region Astronomical Society - Includes observatory information, education section, calendar, gallery, star party information located in Oil City. Berks County Amateur Astronomical Society - Calendar, library, events, and newsletter located at Wyomissing. Amateur Astronomers Association of Pittsburgh - Calendar, facilities, features, guides, and light pollution. The Astronomical Society of Harrisburg, PA - Classes, events, public speaking and observing, information, gallery, star party information, resources, and forum. Bucks-Mont Astronomical Association - Picture archive, calendar of events, club event calendar, observation reports, message board, and activities located in Chalfont. Central Pennsylvania Observers - Skywatch, meetings, resources, calendar, and links located in State College. Chester County Astronomical Society - Astrophotography, calendar, library, maps, and newsletter archive. Chesmont Astronomical Society - Forums, newsletters, articles, and news located at Limerick. PennState Astronomy Club - Meetings, history, events, equipment, and gallery located at University Park. Rittenhouse Astronomical Society - Meetings, events, and items of interest located at Philadelphia. Starlight Astronomy Club - Observation information, schedule, events, and new observer information located at Hollidaysburg. Astronomy Enthusiasts of Lancaster County - Calendar, gallery, events, and resources. York County Astronomical Society - Schedule, telescope clinic, public observing, observatory information, and news located at Jacobus.