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 Active Galactic Nu (1) Astronomy Educa (1) Star Formation & Evolu (1) (-) Heliophy (1) State NY (1) Facet State City Athens (1) Auburn (1) Austin (1) Baltimore (1) Cambridge (1) Greenbelt (2) Iowa City (1) Orangevale (1) Pasadena (1) Reno (1) University Park (1) (-) New York (1) Facet City Membership Class Full Member (1) Facet Membership Class Division SPD (1) (-) LAD (1) Facet Division Showing 1-1 of 1 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States