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 Solar System/Planetary Sci (5) Exopla (4) Star Formation & Evolu (3) Astrobio (2) Astronomy Educa (2) Interstellar Me (2) Galaxy Formation & Evolu (1) (-) Heliophy (2) State AL (5) AZ (2) CA (18) CO (14) DC (1) FL (2) GA (2) HI (1) IA (1) KS (1) KY (1) MA (7) MD (15) MI (1) NH (1) NJ (2) NM (6) OH (2) OR (1) PA (2) TX (3) UT (1) VA (9) WA (2) (-) NY (2) Facet State City Mohegan Lake (1) New York (1) Facet City Membership Class Amateur Affiliate (1) Full Emeritus Member (2) Undergrad Student (1) (-) Full Member (2) Facet Membership Class Division HEAD (6) DDA (1) LAD (1) (-) SPD (2) Facet Division Showing 1-2 of 2 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States Joshua Knight Full Member Affiliation State/Province NY Country United States