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Calvin recommended The Gravity Tractor . 2 years ago
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Not exactly "Armageddon", but the triggering of nuclear weapons close enough to the asteroid to divert its course, but far enough away to prevent impact was found by NA...
The Gravity Tractor
Although gravity is one of the weakest forces in the universe, it is very easy to utilise as all you need is mass. The general premise behind the gravity tractor is to "par...
By covering the side and back of an incoming asteroid with a special paint, solar radiation pressure could be utilized to alter an incoming asteroids orbit.