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NASA Thinks 4,700 Asteroids Threaten Earth

And twice as many as previously believed are in orbits similar to Earth's

By Kevin Spak,  Newser Staff

Posted May 18, 2012 2:10 PM CDT

(Newser) – NASA thinks it's got a pretty solid estimate on the number of gigantic asteroids that could plausibly cause regional or global catastrophe by smashing into Earth: 4,700, give or take 1,500. Included in that number are all the rocks that exist, or...   Read full story »

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NASA • space telescope • outer space • Asteroids • WISE satellite telescope

 
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