Lunar Leonid Strikes

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Each red dot denotes a meteoroid impact observed since Nov. 2005 by members of the NASA Meteoroid Environment Office. Credit: NASA
Each red dot denotes a meteoroid impact observed since Nov. 2005 by members of the NASA Meteoroid Environment Office. Credit: NASA

Meteoroids are smashing into the Moon a lot more often than anyone expected. That's the tentative conclusion of Bill Cooke, head of NASA's Meteoroid Environment Office, after his team observed two Leonids hitting the Moon on Nov. 17, 2006. "We've now seen 11 and possibly 12 lunar impacts since we started monitoring the Moon one year ago," says Cooke. "That's about four times more hits than our computer models predicted."


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