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 Astrobio (2) Exopla (2) Solar System/Planetary Sci (2) Astronomy Educa (1) Galactic Structure & Stellar Populat (1) Heliophy (1) High-Energy Pheno (1) Star Formation & Evolu (1) Supernovae (1) (-) GRBs (1) State AB (1) AL (2) AZ (1) CA (9) CO (1) CT (1) MA (4) Madhya Pradesh (1) MD (1) NC (1) ND (1) NJ (1) NM (2) NY (3) OR (1) PA (1) UT (1) VA (2) WA (4) (-) GA (1) Facet State City Carrollton (1) Facet City Membership Class Full Emeritus Member (1) Facet Membership Class Division HEAD (3) HAD (1) LAD (1) (-) DPS (1) Facet Division Showing 1-1 of 1 results George Sonneborn Full Emeritus Member Affiliation NASA GSFC State/Province GA Country United States