In pictures: How to protect Earth from asteroid destruction

NASA and others are looking to protect the world from asteroid strikes

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The Asteroid Redirect Mission. The NASA mission concept is to use a robotic spacecraft to capture a small near-Earth asteroid -- 13 to 32 feet (4-10 meters) in size -- or remove a boulder 3 to 16 feet (1 to 5 meters) from the surface of a larger asteroid and redirect it into a stable orbit around the moon. Astronauts launched aboard NASA's new Orion spacecraft and Space Launch System rocket would rendezvous with the captured asteroid material in lunar orbit and collect samples for return to Earth, NASA said.

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In pictures: How to protect Earth from asteroid destruction

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