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 (3) Solar System/Planetary Sci (3) Star Formation & Evolu (3) Astronomy Educa (2) Cosmo (2) Active Galactic Nu (1) Astrobio (1) Clusters of Galaxies/Large-scale Struc (1) Galactic Structure & Stellar Populat (1) Galaxy Formation & Evolu (1) GRBs (1) High-Energy Pheno (1) (-) Supernovae (1) State AB (1) AL (1) AZ (3) CA (13) CO (2) CT (1) DC (2) DE (1) FL (3) IL (1) IN (1) LA (1) MA (12) MD (3) MI (2) MN (1) NC (3) ND (1) NH (2) NJ (2) NM (4) NV (1) NY (2) OH (3) OR (3) PA (2) SC (2) TX (1) UT (2) WA (3) WI (4) WV (1) WY (1) (-) GA (1) Facet State City Carrollton (1) Facet City Membership Class Full Member (4) (-) 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