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NASA designing harpoon to capture comet samples (video)
Scientists are developing a harpoon that would blast out of a spacecraft and collect samples from a comet hurtling by.
How do you collect and retrieve samples from a comet racing through space?
NASA scientists at the Goddard Space Flight Center are in the early stages of working that out, by developing a so-called comet harpoon. Check out this NASA video to see what the scientists have been up to in the harpoon test lab. (They couldn't use a cannon in the lab for safety reasons, so they built a big crossbow.)
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