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 (37) Exopla (13) Astrobio (11) Astronomy Educa (11) Star Formation & Evolu (10) Cosmo (8) Interstellar Me (7) Clusters of Galaxies/Large-scale Struc (5) Galaxy Formation & Evolu (4) GRBs (4) High-Energy Pheno (4) Active Galactic Nu (3) Galactic Structure & Stellar Populat (3) (-) Heliophy (8) (-) Supernovae (4) State AB (1) CA (3) CO (2) GA (1) MD (1) NM (1) NY (1) PA (1) Facet State City Bethesda (1) Black Hawk (1) Boulder (1) Calgary (1) Carrollton (1) Geneseo (1) La Crescenta (1) Lititz (1) Pasadena (1) San Ramon (1) Facet City Membership Class Alumni Affiliate (1) Amateur Affiliate (4) Div Affil - DPS (5) Full Member (25) Graduate Student (11) Undergrad Student (10) (-) Full Emeritus Member (11) Facet Membership Class Division SPD (26) HEAD (18) HAD (9) DDA (3) LAD (3) (-) DPS (11) Facet Division Showing 11-11 of 11 results George Sonneborn Full Emeritus Member Affiliation NASA GSFC State/Province GA Country United States Pagination First page « First Previous page ‹ Previous Page 1 Current page 2