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 Active Galactic Nu (1) Clusters of Galaxies/Large-scale Struc (1) Cosmo (1) Galactic Structure & Stellar Populat (1) (-) Galaxy Formation & Evolu (1) State MD (1) (-) MO (1) Facet State City Bloomington (1) (-) Columbia (1) Facet City Membership Class Graduate Student (1) (-) Full Member (1) Facet Membership Class Division Facet Division Showing 1-1 of 1 results Yicheng Guo Full Member Affiliation University of Missouri State/Province MO Country United States