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  1. Viktor

    How do the authors propose binding spinning asteroids, which, in addition, are not monolithic? This is completely unrealistic and is anti-science fiction. As of now, based on system analysis, it is clear that asteroid ablation using highly concentrated sunlight is the only method that meets all of the following criteria: scalability up to global-threat sizes and any type of hazardous bodies as well as low cost and environmental friendliness. This method converts the asteroid to a “natural rocket”, providing more than enough thrust without fuel and energy concerns and therefore its deflection at shortest warning time.

    An improved concept for such solar-based deflection using an innovative solar collector was proposed and substantiated back in 2013 – see
    and also a short demo-video
    as well as relevant section in the Wikipedia (“Asteroid impact avoidance – Use of focused solar energy”).

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