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How Nasa’s DART mission could save Earth from rogue asteroids

Nasa is just hours away from the culmination of its Double Asteroid Redirection Test, or Dart mission, which will see a spacecraft slam into an asteroid Monday evening in a bid to prove it’s possible to change the space rock’s trajectory in space.

It’s a first of its kind proof of concept test of a technology that could one day save Earth from a civilization-ending asteroid strike, or even a minor infrastructure damaging one. The key will be ensuring Dart succeeds in striking its target, an asteroid called Dimorphos some 68 million miles from Earth, and then carefully measuring the results.

“Dart is demonstrating what we call the kinetic impact technique for changing the speed of the asteroid in space and therefore changing its orbit,” Nasa planetary defense officer Lindley Johnson told reporter’s at a Thursday press conference about the mission. “This demonstration is extremely important to our future here on the earth, and life on earth.”

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