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 (8) Exopla (6) Astronomy Educa (4) Galaxy Formation & Evolu (4) GRBs (4) High-Energy Pheno (4) Supernovae (4) Active Galactic Nu (3) Solar System/Planetary Sci (3) Astrobio (2) Cosmo (2) Galactic Structure & Stellar Populat (2) Interstellar Me (2) (-) Heliophy (1) State (-) NY (1) Facet State City Atlanta (1) Berkeley (5) Big Bear City (3) Campbell (1) Coos Bay (1) Fresno (1) Geneseo (1) Glendora (1) La Crescenta (1) Lockport (1) Los Angeles (4) Mohegan Lake (1) Oakland (1) Orangevale (1) Palo Alto (1) Pasadena (6) Rochester (1) Rohnert Park (1) San Diego (5) San Francisco (2) San Jose (1) Santa Cruz (1) Santee (1) Seal Beach (1) South Pasadena (1) Stanford (2) Staten Island (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