Thursday, February 21, 2013

Engage Tractor Beams!

Today's Astronomy Picture of the Day shows a proposed "gravitational tractor" being used to "tow" a dangerous Earth-crossing asteroid out of an orbit that intersects with that blue marble in the distance.

Why would we want to do this? Assuming you missed last week's asteroid flyby and meteor strike (two separate events, mind), take a look at this graphic. Vermin of the skies!

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