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JPL scientists use advanced technologies to track asteroids and comets that have the potential to one day come close to Earth. This story details what seemed to be a close call with an asteroid named Apophis in 2004.

Asteroid, Apophis, 2036, 2029, Space, Solar, System, Planet, NASA, Science, Near, Earth, Object, Comet, potentially, hazardous, Don, Yeomans, JPL, Jet, Propulsion, Laboratory, Paul, Chodas