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NASA has a wild idea to weigh asteroids with a swarm of mini probes

August 20, 2018 1:35 PM
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Asteroids are all around us in space — but they're awfully difficult to weigh, which makes it harder to know how they'll behave.

So, NASA is considering a new spacecraft that would take a novel approach to the problem, enlisting miniature probes to skim past small asteroids. That's the idea behind OpGrav, a project that NASA and the Johns Hopkins Applied Physics Lab are testing. The asteroid-flyby project is explained in a ne...

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