“How to Catch An Asteroid” (AW&ST Dec. 9, 2013, p. 48), concerning various NASA scenarios for capturing and controlling one, seems to involve nets, which would make it hard to control the motion of the asteroid. An obvious solution is to use magnets. Most asteroids are highly magnetic, and using an electro-magnet would allow a lander to easily land and control the motion with its rockets. It could also be repositioned anytime to explore other parts of the asteroid. Nets and ...


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