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 GRBs (1) High-Energy Pheno (1) (-) Supernovae (1) State AB (1) CA (1) FL (1) (-) GA (1) Facet State City Carrollton (1) Facet City Membership Class (-) Full Emeritus Member (1) Facet Membership Class Division DPS (1) (-) HAD (1) Facet Division Showing 1-1 of 1 results George Sonneborn Full Emeritus Member Affiliation NASA GSFC State/Province GA Country United States