Stopping asteroid strikes: Defenders of the Earth | The Economist - Gravity tractor - Document - PDFSEARCH.IO

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Date: 2014-03-18 03:49:26 Near-Earth object Asteroid Gravity tractor Wide-field Infrared Survey Explorer B612 Foundation Spacecraft Comet NASA Asteroid-impact avoidance Spaceflight Space Planetary defense		Stopping asteroid strikes: Defenders of the Earth \| The Economist Add to Reading List Source URL: www.fallingstar.com Download Document from Source Website File Size: 169,44 KB Share Document on Facebook

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