Huge asteroid headed for close encounter with Earth (Reuters)

This radar image of asteroid 2005 YU55 was generated from data taken in April of 2010 by the Arecibo Radar Telescope in Puerto Rico. REUTERS/NASA/Cornell/Arecibo/HandoutReuters - A huge asteroid will pass closer to Earth than the moon Tuesday, giving scientists a rare chance for study without having to go through the time and expense of launching a probe, officials said.

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