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 (-) Interstellar Me (1) State Facet State City Amsterdam (1) Boulder (1) Calgary (1) Carrollton (1) Catonsville (1) Chester (1) La Crescenta (1) Pasadena (2) San Ramon (1) Whitewater (1) (-) Leiderdorp (1) Facet City Membership Class (-) E (1) Facet Membership Class Division (-) HAD (1) Facet Division Showing 1-1 of 1 results W. Butler Burton E Affiliation Emeritus, Leiden Observatory State/Province Country Netherlands