on planetary science. Stern is a member of the AAAS, the AAS, and the AGU.

NASA Associate Administrator

Stern was appointed NASA's Associate Administrator for the Science Mission Directorate, essentially NASA's top-ranking official for science, in April 2007. In this position Stern directed a organization with 93 separate flight missions and a program of over 3,000 research grants. During his tenure a record 10 major new flight projects were started and deep reforms of the

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