Chelyabinsk meteor explosion was a planetary defense wakeup call


On Feb. 15, 2013, Paul Chodas, manager of the Center for Near-Earth Object Studies (CNEOS) at NASA’s Jet Propulsion Laboratory (JPL) in California, was preparing for a NASA TV segment on the flyby of a near-Earth asteroid, 2012 DA14, which was expected to zoom within 17,200 miles (27,680 kilometers) of Earth. 

During this prep work, Chodas was sent a YouTube clip of a large fireball exploding in the skies over Chelyabinsk, a city in the Ural region of Russia.





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