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Scientists Propose to Tether Asteroids to Prevent Direct Impact on Earth’s Surface

Science: Many have proposed the anti-asteroid solutions involve knocking them off-course, which carries its own problems that is, what if you create a fragment that hits Earth regardless of its off setting the Astroids path?

Researchers might have a safer solution but 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 centre of mass and steering it away from our home-world. 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.

There are catches. You need a small asteroid in the first place, of course. Moreover, this requires considerably more time to implement than smacking an asteroid with a spacecraft or projectile. 

It would work well with a coordinated detection and response system, but might take too much time if observers are caught off-guard. It’s another tool in the arsenal, though, and it may be necessary when it’s likely just a matter of when an asteroid enters a collision course, not if.