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 State (-) MD (1) Facet State City Baltimore (1) Bowie (1) College Park (1) Crownsville (1) Ellicott City (1) Greenbelt (1) Mountain View (1) Potomac (1) Scaggsville (1) Sykesville (1) Washington (1) (-) Silver Spring (1) Facet City Membership Class Full Member (1) (-) Full Emeritus Member (1) Facet Membership Class Division SPD (1) (-) HEAD (1) Facet Division Showing 1-1 of 1 results John Hornstein Full Emeritus Member Affiliation State/Province MD Country United States