NASA Planetary Defense: The Asteroid Hunters

NASA Jet Propulsion Laboratory

Jun 30, 2017

Two unique ground telescope operations, at the Catalina Sky Survey in Mt. Lemmon, Arizona, and the Panoramic Survey Telescope and Rapid Response System, or PanSTARRS, located at Haleakala, Hawaii, are responsible for about 90 percent of all near-Earth object discoveries. Find out more about how NASA finds, studies and tracks near-Earth asteroids and comets by visiting



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