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Science
The Science Mission Directorate (SMD) leads the Agency in four areas of research. Earth Science, Heliophysics, Planetary Science, and Astrophysics.
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Aeronautics
Research conducted by ARMD directly benefits today's air transportation system, the aviation industry, and the passengers and businesses who rely on aviation every day.
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Human exploration
The Human Exploration and Operations (HEO) Mission Directorate provides the Agency with leadership and management of NASA space operations related to human exploration in and beyond low-Earth orbit. HEO also oversees low-level requirements development, policy, and programmatic oversight. Please note that NASA has organized its Human Exploration and Operations Mission Directorate into two areas: Exploration Systems Development (https://www.nasa.gov/directorates/exploration-systems-development) and Space Operations (https://www.nasa.gov/directorates/space-operations-mission-directorate).
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Space Technology
STMD rapidly develops, demonstrates, and infuses revolutionary, high-payoff technologies through transparent, collaborative partnerships, expanding the boundaries of the aerospace enterprise. STMD employs a merit-based competition model with a portfolio approach, spanning a range of discipline areas and technology readiness levels.