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Rosetta Probe Ends 12-year Mission with Crash Into Comet

The Rosetta spacecraft's 12-year mission studying a comet came to an end Friday when it crash-landed on the surface as planned, snapping photos along the way. Rosetta, the first space probe to circle a comet, was ordered to fire its thrusters for 208 seconds, slipped out of orbit and collided onto the icy surface of the "67P" comet. Mission controllers said it was traveling about 90 centimeters per second on impact, about a walking pace. Before it crashed, Rosetta...

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