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 Star Formation & Evolu (7) Exopla (6) Astronomy Educa (4) Active Galactic Nu (3) Galaxy Formation & Evolu (3) GRBs (3) High-Energy Pheno (3) Solar System/Planetary Sci (3) Supernovae (3) Astrobio (2) Cosmo (2) Interstellar Me (2) Galactic Structure & Stellar Populat (1) (-) Heliophy (1) State CO (1) (-) NY (1) Facet State City Brooklyn (1) Canton (1) Forest Hills (1) Geneseo (1) Lockport (1) Loudonville (1) Mohegan Lake (1) Rochester (2) Saratoga Springs (1) Schenectady (1) Shanghai (1) Staten Island (1) Washington (1) Yorktown Heights (1) (-) New York (1) Facet City Membership Class Full Member (1) Facet Membership Class Division LAD (1) SPD (1) Facet Division Showing 1-1 of 1 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States