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Planetary Defense at NASA

In 2016, NASA established the Planetary Defense Coordination Office (PDCO) to manage the agency's ongoing mission of finding, tracking, and better understanding asteroids and comets that could pose an impact hazard to Earth. Here you can stay informed about the PDCO, NASA's Near-Earth Object (NEO)  Observations Program, and upcoming planetary defense flight missions, including NASA'S NEO Surveyor mission.

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Near-Earth Asteroids

Monthly update with latest metrics on NASA's search for NEOS.

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News and updates from NASA's Planetary Defense Coordination Office.

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NASA's strategy for safeguarding Earth from potentially hazardous NEOs.

NEO Surveyor

An infrared space telescope designed to accelerate NASA's search for NEOs.


Explore current information on exciting topics.


Planetary Defense Blog

Learn about Planetary Defense.

NEO Surveyor Blog

NEO Surveyor Blog

Learn about the Near-Earth Object Surveyor.