Member Directory The AAS maintains a membership directory to facilitate member interaction and to support the conduct of official Society business. Search directory for: Filter Results By Clear Filters Type of Science Galaxy Formation & Evolu (2) Astronomy Educa (1) State MA (1) Facet State City Baltimore (11) Boulder (1) Catonsville (1) College Park (3) Crownsville (1) Derwood (1) Ellicott City (1) Germantown (1) Greenbelt (5) Hyattsville (1) Marriottsville (1) Silver Spring (2) Towson (1) Washington (3) Facet City Membership Class Facet Membership Class Division Facet Division