Scientists propose tethering asteroids to prevent Earth impacts

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Many proposed anti-asteroid solutions involve knocking them off-course, which carries its own problems — what if you create a fragment that hits Earth regardless? Researchers might have a safer solution. They’ve proposed a system (spotted by Parabolic Arc) that would tether a threatening asteroid to a smaller rock, throwing off the larger body’s center of mass and steering it away from our homeworld. As the method only involves a giant cable, it wouldn’t risk cracking an object into pieces.

The scientists couldn’t test this in real life, of course, so they used a simulated version of Bennu to see how well their idea would work. It’s viable for protecting the planet in a range of conditions, the team said.

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