text: Space probe aims to slam into comet and possibly help future scientists determine how to keep such space rocks from colliding with Earth. impactor on July 4, 2005, and the comet #39;s rocky part will hit it at a speed of 23,800 miles an hour (10.
inputs: Space probe aims to slam into comet and possibly help future scientists determine how to keep such space rocks from colliding with Earth. impactor on July 4, 2005, and the comet #39;s rocky part will hit it at a speed of 23,800 miles an hour (10.