National Aeronautics and Space Administration NASA anticipated the close flyby of asteroid 2012 DA14 on February 15, 2013, but the asteroid explosion above Chelyabinsk, Russia that same day was unexpected. With over 1,0

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Date: 2013-07-28 13:19:55 Mountain View California Government of the United States NASA Near-Earth object Potentially hazardous object Ames Research Center Centennial Challenges Hubble Space Telescope NASA Research Park Spaceflight Space Planetary defense		National Aeronautics and Space Administration NASA anticipated the close flyby of asteroid 2012 DA14 on February 15, 2013, but the asteroid explosion above Chelyabinsk, Russia that same day was unexpected. With over 1,0 Add to Reading List Source URL: www.nasa.gov Download Document from Source Website File Size: 430,34 KB Share Document on Facebook

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