National Aeronautics and Space Administration

• Focus Areas
• Related Big Questions
  • How do planets, stars, galaxies and cosmic structure come into being?
  • When and how did the elements of life in the Universe arise?
• SMD Programs
  • Astrophysics Explorers
  • Cosmic Origins
  • Discovery
  • Earth System Science Pathfinder
  • Earth Systematic Missions
  • Exoplanet Exploration
  • Explorers
  • GOES / POES
  • Heliophysics Explorers
  • Heliophysics Research
  • Living With a Star
  • Mars Exploration
  • Missions of Opportunity
  • New Frontiers
  • Outer Planets Flagship
  • Physics of the Cosmos
  • Robotic Lunar Exploration
  • Solar Terrestrial Probes

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• KAO