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 Astrobio (1) Heliophy (1) Solar System/Planetary Sci (1) (-) Exopla (1) State AZ (1) Facet State City Austin (1) Baltimore (1) Berkeley (1) Boulder (2) Calgary (1) Cambridge (1) Corvallis (1) Fairfax (1) Fort Myers (1) Grand Forks (1) Greenbelt (1) Hanover (1) Heidelberg (1) Los Angeles (1) Palo Alto (1) Pasadena (2) Potomac (1) Rohnert Park (1) Sagamihara (1) Seattle (2) Sparks (1) Tucson (1) University Park (1) (-) Flagstaff (1) Facet City Membership Class Full Member (1) Facet Membership Class Division DPS (1) (-) SPD (1) Facet Division Showing 1-1 of 1 results Christoph Keller Full Member Affiliation Lowell Observatory State/Province AZ Country United States