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 (1) Heliophy (1) Solar System/Planetary Sci (1) (-) Astrobio (1) State AZ (1) Facet State City Austin (1) Baltimore (1) Berkeley (2) Bethesda (1) Boulder (2) Calgary (1) Cambridge (2) Columbus (1) Corvallis (1) Durham (1) Grand Forks (1) Heidelberg (1) Honolulu (1) Iowa City (1) La Jolla (1) Los Angeles (1) Lowell (1) Mohegan Lake (1) Newark (1) Palo Alto (1) Pasadena (1) Rome (1) Seattle (1) Sparks (1) Stanford (1) Tucson (1) Usaf Academy (1) Washington (1) (-) Flagstaff (1) Facet City Membership Class Full Member (1) Facet Membership Class Division DPS (2) (-) SPD (1) Facet Division Showing 1-1 of 1 results Christoph Keller Full Member Affiliation Lowell Observatory State/Province AZ Country United States