The Chelyabinsk meteor explosion was a planetary defense alert

On February 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 about the flyby. of a near-Earth asteroid. , 2012 DA14, which should come within 17,200 miles (27,680 kilometers) of Earth.

During this prep work, Chodas received 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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