Nudging Killer Asteroids Off Course
All Things Considered, November 10, 2005 · Space scientists say they've come up with a novel way of a preventing a killer asteroid from hitting the Earth -- without laying a hand on it. A spaceship called a "gravity tractor" could pull the asteroid off course just by hovering near its surface.
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Bryan, who listens to WAMC in the Northeastern U.S.:
"[This story] was playing on ATC when we pulled into the driveway after a long day of work and preshool. Having previously learned about asteroids on an educational video, my 4-year-old son Max, intensely listening to a story about asteroids, resquested that I not turn off the radio until the end of the story. It was his first "Driveway Moment."