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Reflecting on an Asteroid's Really Close Encounter with Earth By ANDREW C. REVKIN

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"Amid all the progress on this planet -- declining losses from terrible diseases and war, rising literacy and the rest -- there remain plenty of planet-scale risks requiring serious focus, from pandemic flu to centuries of locked-in climate change to, yes, collisions with space rocks." THIS WEEK AN ASTEROID will pass not only far inside the orbit of the Moon, but even closer than the 22,300-mile distance where geosynchronous satellites orbit....On longer time scales, of course, the inevitability of discovering an asteroid on a collision course is clear -- which makes figuring out strategies for dealing with that eventuality not simply fodder for screenwriters and novelists.

There's plenty more on "Close Encounters of the Rocky Kind" on Dot Earth.

Read the rest of the story HERE:


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