'Gravity tractor' to deflect Earth-bound asteroids
'Gravity tractor' to deflect Earth-bound asteroids
NewScientist.com News Service Nov. 9, 2005
NASA scientists have come up with a surprisingly simple yet effective
way to deflect an Earth-bound asteroid: park a large spacecraft
close by and let gravity do the work, creating an invisible towline
to tug the rock off its deadly course.
The strategy crucially relies on our ability to detect an
asteroid threat about 20 years in advance. For...
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