Word: impactor
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...Impactor Designed to collide and die, it carries few instruments but a lot of weight 820 lbs. in all. More than 200 of those pounds make up a copper cratering mass, which increases the size of the hole the impactor digs...
...size probe began its journey from Earth last January carrying an 820-lb. impactor...
...impactor is released 24 hours before the planned collision and travels the final 500,000 miles on its own, adjusting its trajectory as it goes...
...impactor strikes the comet at a relative speed of 23,000 m.p.h., annihilating itself and gouging out a crater that could be up to 14 stories deep...
...Flyby Spacecraft The ship, 11 ft. long and weighing 1,325 lbs., is powered by solar panels and a rechargeable battery. It uses a suite of instruments to survey the comet. It also gathers and relays data from the impactor...