The U.S. space agency NASA says the twin spacecraft of its lunar-mapping mission have completed their assignment and have been deliberately crashed into the rim of a moon crater. Officials say the probes named Ebb and Flow hit the moon's surface Monday afternoon, eastern U.S. time, in the last phase of NASA's GRAIL mission. The twin spacecraft hit a mountain near the lunar north pole, bringing their successful mission to an end. Ebb and Flow were purposely sent crashing into the ...
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