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) (-) Astrobio (1) (-) Solar System/Planetary Sci (1) State (-) AZ (1) Facet State City Tucson (1) (-) Flagstaff (1) Facet City Membership Class Full Member (1) Facet Membership Class Division DPS (6) HAD (2) (-) SPD (1) Facet Division Showing 1-1 of 1 results Christoph Keller Full Member Affiliation Lowell Observatory State/Province AZ Country United States