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Radio waves and lasers travel at the speed of light, but the fastest "things" ever built are obviously spacecraft. They have extremely long distances to travel.

The fastest velocity ever achieved by a powered spacecraft is being achieved by the New Horizons spacecraft heading for a rendezvous with Pluto in July 2015. It set the powered record of 36,373 mph after its launch from Earth in 2006. It attained a maximum speed of about 52,000 mph using a flyby of the planet Jupiter in February 2007.

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Q: What is the fastest thing man has ever invented and how fast can it go?
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