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 (-) Heliophy (1) State (-) NY (1) Facet State City Geneseo (1) Mohegan Lake (1) Rochester (1) (-) New York (1) Facet City Membership Class Full Member (1) Facet Membership Class Division DDA (2) LAD (2) DPS (1) HAD (1) HEAD (1) (-) SPD (1) Facet Division Showing 1-1 of 1 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States