Arecibo image of a potentially hazardous asteroid

Arecibo image of a potentially hazardous asteroid
Arecibo image of a potentially hazardous asteroid The Arecibo radio telescope was used to take this delay-Doppler image of potentially hazardous asteroid 2005 YU55 on April 22, 2010, during a close approach to Earth. At the time, the asteroid was more than two million kilometers from Earth. Cornell University

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