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 Exopla (1) Galaxy Formation & Evolu (1) Interstellar Me (1) Star Formation & Evolu (1) (-) Heliophy (1) (-) Solar System/Planetary Sci (1) State AL (1) CA (4) GA (1) IA (1) MA (4) MD (4) MI (1) NC (1) NM (3) NV (1) OR (1) PA (2) TN (1) TX (2) WI (1) (-) NY (2) Facet State City New York (1) Facet City Membership Class Alumni Affiliate (1) Undergrad Student (2) (-) Full Member (2) Facet Membership Class Division HEAD (8) DPS (4) DDA (2) SPD (2) HAD (1) (-) LAD (2) Facet Division Showing 1-2 of 2 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States Dmitry Ivanov Full Member Affiliation Columbia University State/Province NY Country United States