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 Clusters of Galaxies/Large-scale Struc (1) Cosmo (1) State Facet State City Lititz (1) Newville (1) Pittsburgh (2) University Park (2) Facet City Membership Class Facet Membership Class Division Facet Division